26th Luxury Watch Trends 2025 | 10 Patek Philippe Models Recommended by AI

This time, we will be looking at 10 recommended Patek Philippe watch models selected by AI .

Luxury watches have been gaining attention as assets in recent years. Among them, Patek Philippe, also known as the "King of Watches," is attracting attention not only from watch enthusiasts but also from investors.

Beginners may wonder, "Which models will be more valuable in the future?" and "What should I buy first?" On the other hand, collectors are probably checking market trends and rarity on a daily basis, hoping to find the next gem.

In this article, we will introduce 10 Patek Philippe models that are considered to be high investment value as of 2025 , catering to the perspectives of both beginners and collectors.

introduction

Patek Philippe watches have built an unrivaled brand power through tradition, innovation, and high technical capabilities since the company's founding. Many popular models are difficult to obtain even at the list price, and due to their rarity, they can sell for several times the list price on the second-hand market.

Now, let's take a look at the top 10 recommended Patek Philippe models selected by AI from an investment perspective.

• Nautilus Ref. 5711/1A-010 (Stainless Steel, Blue Dial)
• Nautilus Ref. 5712/1A-001 (Moon Phase Model)
• Nautilus Ref. 5990/1A-011 (Travel Time Chronograph)
• Aquanaut Ref. 5167A-001 (casual rubber strap)
• Aquanaut Ref. 5168G-001 (42mm large case in white gold)
• Calatrava Ref. 3919J (Vintage, a masterpiece with a hobnail bezel)
• Calatrava Ref. 5196J (A Classic Manual-Wound Dress Watch)
• Chronograph Ref.5070R (42mm large case hand-wound chronograph)
• Perpetual Calendar Chronograph Ref.5970G (Classic Grand Complication)
• Annual Calendar Ref.5146J (A product that combines practicality and tradition)

Each of the 10 models above has its own appeal and asset value . In the next section, we will delve deeper from various angles, such as trends among young people, explanations of specific models, and reasons why they are popular in the market.

①Nautilus Ref.5711/1A-010

Model Overview

This three-hand model is the purest successor to the spirit of the original Nautilus from 1976. The 40mm stainless steel case is combined with an octagonal bezel reminiscent of a porthole and an integrated bracelet to achieve a slim design with a thickness of 8.3mm. The horizontally embossed blue dial changes shade depending on the angle of the light, making it suitable for a variety of occasions from business to casual. In particular , the models manufactured after 2019 are equipped with the new movement Cal.26-330SC, which has no hack function or prohibited time period for changing the date , and are highly rare due to the small number of units manufactured. It was manufactured for 15 years since its birth in 2006, but production ended in 2021. Since then, its rarity has exploded and it has been described as "the hardest stainless steel watch to obtain."

Market price

The list price at the time of release was about 3.3 million yen. However, reservations were suspended at authorized stores for many years, and the market price exceeded 10 million yen around 2017. After the announcement of the discontinuation in 2021, the price soared to over 20 million yen, and currently ranges from 15 to 20 million yen depending on the condition and accessories. The Ref. 5711/1A-014 with an olive dial, released in the final year, recorded a price of over 35 million yen at auction, leading the price of all derivative models. Even during the global economic adjustment phase, the decline was small, and it boasts one of the strongest resistance to price collapses.

Recommended points

The formula "Nautilus = Ref. 5711" has become so well-established that it has become an icon, and its outstanding brand recognition guarantees liquidity. The simple yet sophisticated design goes well with any age or outfit, and it looks better when enjoyed daily rather than stored away. With global demand always far exceeding supply, it can be said to be a representative "financial asset that you can enjoy wearing" that can be expected to sell for a high price even for second-hand items.

②Nautilus Ref.5712/1A-001

Model Overview

A petite complication model with an asymmetric arrangement of moon phase, pointer date, and power reserve. Equipped with an ultra-thin automatic movement Cal.240 PS IRM C LU in a 40mm stainless steel case, the complex mechanism is condensed into a thickness of just 8.5mm. The layout of the dial is unique, and the design is outstanding, making it immediately recognizable as a Ref.5712. Since its introduction in 2006, it has been as popular as the Ref.5711, but the total production volume is even smaller.

Market price

The final domestic list price was about 4.5 million yen, while the used market price was around 15 to 17 million yen. The stainless steel version was quietly dropped from the catalog in 2025, resulting in a rush of buyers and an increase in transaction prices. In the future, the added value of maintenance will increase due to restrictions on movement supply and parts procurement, and it is expected that the rarity premium will become even stronger in the long term.

Recommended points

The bold dial design that breaks symmetry is a matter of love or hate, but for those who are into it, there is no substitute, making it a one-of-a-kind piece. There are fewer units available than the Ref. 5711, and it is a rare piece that allows you to enjoy a complex mechanism in a sports line, so it is expected to continue to be popular as a collector's piece in future auctions.

③Nautilus Ref.5990/1A-011

Model Overview

A Nautilus for the "traveling businessman" that integrates a flyback chronograph, dual time, and local date in a 40.5mm case. Cal. CH28-520 C FUS combines a column wheel chronograph and dual time mechanism, allowing instant home/local switching with a pusher. The design is also excellent, keeping the thickness at 12.5mm while ensuring water resistance.

Market price

The list price is about 11 million yen. The early gray dial Ref. 5990/1A-001 rose to nearly 18 million yen immediately after production ended in 2021. The blue-black dial Ref. 5990/1A-011 from 2023 is stable at 19 to 20 million yen. As the rarity of the old dial becomes more apparent, the number of owners collecting different colors is increasing.

Recommended points

Patek is known for its high level of perfection, with multiple functions yet maintaining a balanced design. You can enjoy the practicality that is truly valuable on business trips and the Nautilus brand at the same time. Even if new dial colors or different materials are released in the future, the supply of the early model Ref. 5990/1A-001 will not increase, so possessing a rare color may be a long-term differentiating factor.

④Aquanaut Ref.5167A-001

Model Overview

A three-hand model that symbolizes the Aquanaut, which debuted in 2007. The combination of a 40mm stainless steel case, a lattice-patterned black dial, and a rubber strap with the same pattern creates an urban sporty look. At just 8.1mm thick, it fits easily under a suit cuff, making it ideal for everyday use. Around 2022, the buckle will undergo minor changes and the movement will be changed to Cal. 26-330 SC , which has a hacking function and no longer has a time limit for changing the date. As this model is rarely available, there is strong demand and the market price is differentiated.

Market price

The list price is about 3.92 million yen, but due to the rarity of only a few units being stocked at authorized stores each year, the used market price has settled at 7 to 9 million yen. Even after the release of the new generation Ref. 5268 and Ref. 5968 series, it remains popular, and prices tend to rise when stock on the parallel market dries up.

Recommended points

While being in an affordable price range as a "first watch" for Patek Philippe, it is also a valuable and practical watch as a brand icon. Its waterproof performance and light feel mean it can be used in any situation, and it is also easy to turn into cash when selling, making it ideal for investment beginners.

⑤Aquanaut Ref.5168G-001

Model Overview

This jumbo-sized white gold model was released in 2017 to celebrate the 20th anniversary of the Aquanaut. While the stainless steel model has a black dial, this model features a blue gradient dial like the Nautilus. It expresses a refreshing marine feel with a rubber strap of the same color. The 42.2mm case is made of beautifully lustrous white gold, while the rubber strap keeps the weight down and makes it comfortable to wear. Like the stainless steel Ref. 5167A-001, the buckle has been slightly changed and the movement has been changed to Cal. 26-330 SC, which has a hack function and no longer has a time period when the date cannot be changed, and it has been highly praised.

Market price

The list price is about 8.3 million yen. When it was first released, it was around the list price, but when it became clear that the number of productions was small, demand increased, and by 2025, the price had risen to the 11 to 13 million yen range. In particular, unused older models have become significantly more premium.

Recommended points

Despite its luxurious specifications of a large case and gold, it is a rare model that can be worn casually, and is in high demand among young, wealthy people, combining a desire to own with high resale value.

⑥Calatrava Ref.3919J

Model Overview

An iconic dress watch with a hobnail bezel that was introduced around 1986. The 33mm yellow gold case, Roman indexes, and leaf hands create a classy look. The hand-wound movement Cal.215 PS is super thin at 2.55mm thick, and fits comfortably on the wrist.

Market price

The average price on the used market is about 1.5 to 2 million yen. The condition of the dial greatly affects the price. In recent years, the number of good quality examples has decreased, and the actual price is gradually increasing.

Recommended points

This classic face, which can truly be called "Patek Philippe," is available at an affordable price, making it an ideal entry-level model. The modest case diameter means that it is not affected by trends, and it may become even more rare if you hold it for a long time, highlighting its hidden potential.

⑦Calatrava Ref.5196J

Model Overview

A 2004 model that incorporates the DNA of Ref.96 into a modern 37mm size. The combination of yellow gold, silver dial, and dauphine hands embodies the ultimate in minimalism. The hand-wound movement Cal.215 PS protects the historical context with a solid case back .

Market price

The final domestic list price was about 3 million yen. Since the end of production was rumored in 2021, it has become scarce, and is currently fetching between 3 million and 3.5 million yen on the second-hand market. In some cases, unused older models can reach the 4 million yen range.

Recommended points

This watch is said to be the ultimate dress watch. Prices are relatively stable, making it an excellent "protective" asset. Demand is also high at important life events such as marriage and promotion, creating a market that is unlikely to taper off.

⑧Chronograph Ref.5070R

Model Overview

This rose gold model from the Ref. 5070 series, which was released in yellow gold in 1998, features a tachymeter scale in a 42mm case, which was large for the time, and is equipped with the hand-wound movement Cal. CH27-70 (based on Lemania). The two-counter chronograph is a prime example of the "neo-classic" style, combining visibility and visual impact.

Market price

The original retail price was about 5 million yen. Currently, it is fluctuating between 10 and 12 million yen on the used market. The production period was short, from 2004 to 2008, and the number of units produced per year was only a few hundred, so the number in circulation is small, and the upward trend continues.

Recommended points

With its unique position as the last generation of Lemania with a large case, the rarity value is likely to increase as it becomes more vintage. The aging of the dial color also adds to the charm, so there is a lot of fun in owning it for a long time. A romantic frame that shows presence on the wrist while also helping you build assets.

⑨Perpetual Calendar Chronograph Ref.5970G

Model Overview

Introduced in 2004, this grand complication model features a hand-wound chronograph and perpetual calendar in a 40mm white gold case. Its greatest feature is that it was the last to feature the Cal. CH27-70Q movement, an improved version of the Lemania Cal. 2310. Its beautifully flowing lugs and step bezel give it a classic yet powerful appearance, and it also features a moon phase and leap year display.

Market price

The list price is about 12 million yen. After production ended, the market price has been rising steadily, and as of 2025, it is about 25 to 30 million yen. Unique pieces are even more premium, and there are many cases where they are sold for over 35 million yen.

Recommended points

As the last Lemania generation watch with the signature "chronograph + perpetual calendar" of Patek Philippe, this watch has outstanding historical significance. The case diameter is more compact than the current Ref. 5270 series, making it easier to wear and earning a cult following among watch enthusiasts. This is an item for long-term storage that is expected to become a regular item at auctions in the future.

10. Annual Calendar Ref.5146J

Model Overview

This is the second generation model equipped with the annual calendar mechanism developed by Patek Philippe in 1996. The 39mm yellow gold case and gray dial create a classical atmosphere, while the practical design features a moon phase and power reserve display. The automatic movement Cal.324 S IRM QA LU has a 21K gold rotor that ensures high winding efficiency and is also equipped with a hacking function. It has been a long-selling watch since its introduction in 2005 as a "versatile formal" watch that combines classic design with a practical complex mechanism, and the elegance of the elegant leaf hands and applied indexes has earned it high praise from all generations.

Market price

The domestic list price at the time of release was about 4.3 million yen. Around 2020, the market price was in the early 3 million yen range, but after production ended in 2024, it began to gradually rise, and currently (spring 2025) the mainstream range is 4 to 5 million yen. Its popularity is stable, and there are few cases of significant price drops. Compared to the Nautilus and Aquanaut, the price movement is more moderate, but in the long term it has been gradually increasing. Early production units and mint condition units with unpolished cases are particularly rare, and in some cases a premium of 10 to 20% is added. At auctions, there have been cases where unused units with all accessories have been sold for over 5.5 million yen.

Recommended points

It is not as expensive as a perpetual calendar, and its greatest strength is the convenience of being able to enjoy full calendar functions with a simple adjustment once a year. The exquisite size of 39mm and the gorgeousness of the yellow gold elevate formal occasions, while the highly visible sub-dial arrangement makes it suitable for everyday use. Since it has been discontinued, distribution on the second-hand market is limited, but the price is still reasonable and it is in the initial stage of price increases, so it is a good time to aim for "room for growth". If you can secure a good one with all the accessories, you can have fun while also expecting a solid return. When it joins the ranks of vintage watches in the future, it may support your portfolio as a defensive stock that stands out among dressy watches of the same era.

Young people's preference for luxury watches and the power of the Patek Philippe brand

In recent years, interest in luxury watches has been growing among young people in their 20s and 30s. The desire to own a Patek Philippe someday is spreading not only among the traditional wealthy, but also among the new generation of successful people in the IT industry and entrepreneurs.

For the younger generation, owning a Patek Philippe watch is a symbol of status . In particular, the sporty and casual models are easy to match with suits as well as casual clothes, and are popular for their "coolness that can be worn both for business and private occasions."

For example, the popular entry-level model Aquanaut Ref. 5167A has a casual rubber strap and simple design that has garnered support from the younger generation. It is a relatively affordable price range for Patek Philippe, but currently a used one is priced at over 6 million yen. Even so, there are many new fans who are considering buying it because it is more affordable than other models.

On the other hand, for collectors, Patek Philippe is a brand that is above the rest . The question " Do you own a Patek? " is often exchanged between collectors, and just owning one is enough to make you stand out. Patek Philippe in particular is the epitome of the technology and philosophy that has been passed down throughout its history dating back to 1839. For this reason, "owning a Patek Philippe watch" is an experience that will retain its value for generations to come.

For young people, it is an aspirational and personal investment, and for collectors, it is a source of pride and tradition - it can be said that Patek Philippe offers special value to people of different generations and positions .

*Images generated by AI

The Patek Philippe brand also attracts the younger generation from the perspective of asset value. With the idea that "if you're going to spend a lot of money, you might as well get something that won't lose value," more and more people are choosing Patek Philippe as their first luxury watch, as it is less likely to lose value in the future.

In fact, Patek Philippe's limited production models and popular sports models are likely to be sold for more than their purchase price on the second-hand market. The Nautilus and Aquanaut mentioned earlier are prime examples, and they are so popular that you may need to wait in line at an authorized store or build up a purchase history in order to purchase them.

For beginners, it is a good strategy to start with a model that is unlikely to lose value (such as some Calatravas and Aquanauts) within a reasonable range, and then move on to a Nautilus once you have become accustomed to watches. On the other hand, collectors may already own many rare models, but when a new limited edition model is released, they are on high alert, hoping that it may be the next great model. Either way, there is no doubt that the reliability of the Patek Philippe brand itself attracts a wide range of people, from young people to experienced enthusiasts.

A complete guide to the Patek Philippe Nautilus

Among Patek Philippe's most popular investment watches , the Nautilus is by far the most popular. Designed by Gerald Genta in 1976, this luxury sports watch shocked the watch world with its innovative style of unique octagonal bezel and case-integrated bracelet.

Among them, the stainless steel model Ref. 5711/1A-001 released in 2006 is overwhelmingly popular despite being a simple three-hand watch. The list price was about 3.3 million yen, but the model's rarity has skyrocketed since production ended in 2021. At its peak, it was priced at over 20 million yen used, and even now it is traded for around 15 million yen.

The popularity of the Ref. 5711 is so great that the special model from the final production year , Ref. 5711/1A-014 (olive green dial), sold for tens of millions of yen at auction. In response to this, a new successor , Ref. 5811/1G-001 (made of white gold), was announced in 2022, but this one also requires a long wait time for its list price of approximately 11.8 million yen. This shows how enduring the popularity of the Nautilus is.

Other Nautilus derivatives , such as the Ref. 5712/1A-001 with moon phase and power reserve display, and the Ref. 5990/1A-011 with chronograph and dual time function, all sell for high prices. The complicated models are no exception, and they have a presence that goes beyond the scope of stainless steel sports watches.

So why is the Nautilus such a great investment? Here are some key reasons:

• Scarcity: Annual production is limited and demand far exceeds supply.
• Uniqueness: Timeless appeal thanks to Gerald Genta's legendary design. Still as good as ever after 50 years.
• Brand guarantee: An iconic part of the Patek Philippe brand, the value of your investment is guaranteed, giving you peace of mind.
• Market performance: The fact that prices have risen to several times the list price over the past few years has given people confidence that the price is unlikely to drop.

The Nautilus is so famous that even beginners have heard of it, but the hurdle to actually getting one is very high. It is said that in order to purchase it from an authorized store, you need to have a track record of purchasing other models. Because of this, there is a never-ending trend of people buying it on the used market even at premium prices, with the idea that " when you can, it's the time to buy."

From the collector's point of view, the Nautilus is already highly acclaimed and may be "a presence that needs no further discussion." However, every time a new limited edition model or special specification (such as a Tiffany dial) appears, the market is once again drawn to the Nautilus as an investment target. Because it is a model that always remains at the center of the market, it is impossible to avoid the Nautilus when talking about watch investment.

*Images generated by AI

If you were to buy a Nautilus on the second-hand market today, you would need to pay several times the retail price of a new one a few years ago, depending on the condition and accessories. This is proof that the watch is highly valued in the market, but you should still be a little careful about the future.

Why Case Diameters Over 40mm Are So Popular

In recent years, large models with case diameters of over 40mm have become especially popular in the luxury watch market. In the world of dress watches, where 36mm to 39mm diameters were once the norm, there is now a demand for watches with a more striking appearance.

Patek Philippe is no exception, and there is a trend towards larger models that were previously modest in size. For example, the Calatrava series, which used to be around 37mm, now has a 41mm model, and the Aquanaut sports line, Ref. 5168G , is an unusually large case for Patek, measuring 42.2mm, which has become a hot topic.

Why are such large watches so popular? Here are some reasons behind it:

• Improved visibility: The large dial makes it easy to read the time and is highly practical.
• Presence and fashionability: It makes an impact as an accessory that stands out on the wrist and also looks great with casual outfits.
• Latest model trends: The entire watch industry is becoming sporty-oriented, with each brand introducing larger models.
• Linkage of asset values: Popular large models on the market are in high demand, and second-hand prices are stable and tend to rise.

In the case of Patek Philippe, there are old collectors who prefer the traditional small cases, but the new wealthy and young people tend to see the large cases as "modern and luxurious". For example, the aforementioned Ref. 5070 (42mm chronograph), a model that was evaluated as too large when it was first released, has been reevaluated over the years and is now traded at a high price.

For beginners, models over 40mm may be more modern and easy to wear when choosing a Patek Philippe. In fact, more and more young enthusiasts are buying their first watch, attracted by casual and striking models, overturning the old image of "Patek Philippe = sophisticated dress watch."

On the other hand, models with larger case diameters may be produced in smaller numbers. Since brands tend to produce limited quantities of luxury models in particular, the combination of a large case and limited production can easily cause market prices to soar.

*Images generated by AI

In general, it is no exaggeration to say that models with case diameters over 40mm are the main players in the modern market. Patek Philippe is also expanding its product lineup in line with this trend, which is creating a virtuous cycle that attracts even younger generations. In terms of investment, it may be possible to look back in the future and say, "It was a good decision to buy a large model."

Future outlook

So how will the investment value of Patek Philippe change in the future? Looking back at the past few years, the Nautilus and other watches saw price increases without limit due to a temporary market overheating, but there has been some adjustment since around 2023. Nevertheless, in the long term, the upward trend has not been disrupted, and many experts believe that "Patek is strong after all."

Particularly noteworthy is the rise in the value of non-sports models. Nautilus and Aquanaut are already stable at high prices, but in the future, there is a possibility that a wave of revaluation will come to traditional complication models (perpetual calendars, minute repeaters, etc.) and vintage models. For example, it is conceivable that some Calatrava and annual calendar models, which have been stable in price for a long time, will attract attention because they are more affordable than sports models.

In addition, Patek Philippe itself periodically revises its prices and raises the list price of new watches, but there are cases where the price on the second-hand market soars at a faster pace than this. If the economic situation changes in the future, there may be temporary fluctuations in the supply and demand balance, but the trust that "Patek will be rewarded if you hold it for the long term" is unlikely to waver.

Buying a watch in the hope of short-term profits does involve risk. However, if you are looking to own a classic and popular model like those introduced in this article for the long term, and enjoy it while waiting for the asset value to increase, then Patek Philippe can be said to be a very attractive "real asset."

Whether you're a beginner or a collector, when you get your hands on a Patek Philippe watch, we hope you'll feel the tradition and recognition in the market behind it and use it for a long time to come.

And don't forget to keep the box, warranty, and other accessories in a safe place in case you ever decide to let go of it. A well-cared-for watch will surely be passed down to the next owner and will continue to retain its value.

We also publish a Patek Philippe purchase price chart , so please refer to it when considering selling. Also, why not come to the store and see your favorite model in person to get a feel for its value?

summary

Patek Philippe watches are also extremely attractive from the perspective of "asset value." For beginners , there is the peace of mind that the price will not depreciate , which eases the anxiety of buying an expensive watch, and for collectors , there is the unwavering trust in the brand, backed by years of experience.

All of the 10 models introduced here embody the tradition and innovation that Patek Philippe has cultivated, and have earned a solid reputation in the market. Of course, the market price fluctuates over time, but when you think about the joy of owning a Patek Philippe watch and its future value, the joy of getting your hands on one is all the more special.

Finally, don't forget to appreciate the watch itself, not just as an investment. Patek Philippe's advertising slogan is " you know...you look after it for the next generation," and it is only with love for a watch that you can pass on its value to the next generation.

The world of luxury watches is complex, and Patek Philippe will continue to fascinate us as the pinnacle of luxury watches. We hope you will find your own one and use it for a long time.

FAQ

Q: Are Patek Philippe watches really a good investment?

A: Yes, Patek Philippe watches are said to be better investment targets than other brands. Historically, there are many models that have risen in value significantly, and if it is a standard model, there is a high possibility that it can be sold second-hand for more than the purchase price. However, it does not guarantee short-term profits. Price movements fluctuate depending on market conditions and the popularity of the model, so it is important to take a long-term perspective . It is also important that it is a watch that you like. Ideally, if you own it for a long time while taking care of it with love, the value will increase as a result.

Q: What should a beginner pay attention to when buying a Patek Philippe?

A: If you are buying a Patek Philippe for the first time, please pay attention to the following points.

• Buy from a trusted source: Choose an authorized dealer or a reputable second-hand store to avoid the risk of buying a fake.
• Check the warranty and accessories: If you are buying a second-hand item, check that the guarantee (warranty) and box are included. This will affect the valuation when you sell it in the future.
• Consider maintenance costs: Luxury watches require maintenance costs, such as overhauls (disassembly and cleaning). In addition to your purchase budget, you should also consider regular maintenance costs.
• Choose a model that suits your style: Investment value is important, but if you're going to wear it every day, your preference in design is also important. Don't compromise just because you think the value will increase, but choose a piece you'll love.

Q: Is there a way to purchase popular models at list price?

A: It is very difficult to purchase a popular Patek Philippe model at the retail price, but there are some things you can do to increase your chances.

• Pre-order/list at multiple authorized stores: Instead of limiting yourself to one store, try asking authorized retailers in Japan and abroad to stock the item or list it on backorder.
• Build lasting relationships: If you visit the store regularly and get to know the staff, you may be given priority access to new stock.
• Build a track record: Instead of aiming for popular models straight away, start by purchasing less popular models or classic models, and build up a track record with customers, which may give you preferential treatment in the future.
• Look overseas: Check out boutiques and authorized dealers overseas, and expand your range of activities by visiting them in person when traveling to increase your opportunities.

Even so, there is no guarantee that you will be able to get it at the regular price, and luck and timing play a large role. Be sure not to miss any information and keep your ears open.

Q: What do you think will happen to second-hand Patek Philippe prices in the future?

A: It is not possible to predict future market prices, but the general consensus is that they will remain strong in the long term . In the short term, they may fluctuate depending on the global economy and the supply and demand balance. For example, in the past, prices have temporarily stabilized during economic downturns. However, rare models from top brands such as Patek Philippe have a track record of steadily increasing in value over the long term. Therefore, unless the entire market collapses in the future, there is little risk of a significant drop in prices. Iconic models such as the Nautilus are expected to continue to maintain high prices. However, market prices may change due to rising list prices for new products or exchange rates, so it is important to keep a close eye on the latest trends.

Q: How can I maintain and increase the value of my Patek Philippe watch?

A: In order to maintain the value of your watch after purchase, be careful with how you handle and store it. Even when using it daily, it is important to avoid extreme shocks and submersion in water, and not to use it in an environment that exceeds the waterproof performance. When not in use, store it in a collection box or special case and in a place away from high temperatures and humidity. It is also important to have regular overhauls at an authorized service center and keep the internal mechanical condition in good condition. If you have a record of overhauls, it will be more reliable when selling it second-hand. In addition, never let go of the set of accessories that came with the purchase, such as the box, warranty card, and instruction manual. Individuals with all accessories are highly valued in the second-hand market. Finally, if possible, handle it carefully on a daily basis to avoid major scratches. Minor scratches can be dealt with by polishing, but deep scratches and dents may affect the value. If you pay attention to these points and use it carefully, your Patek Philippe watch will maintain its high value over the years, and in some cases, it can even become more valuable than when you bought it.