Good evening everyone.

This time, I would like to introduce two of my recommended "Ref. 3970" watches with Lemania-based movements, but in different materials! We have two of them in stock at the same time, so I would like to introduce them to you! They are more exciting than ever, so don't miss them! (lol)
"Ref.3970EJ-051"
"Perpetual Calendar Chronograph" 18KYG
&
"Ref.3970EP"
"Perpetual Calendar Chronograph" PT
The specifications of the "Perpetual Calendar Chronograph" "Ref. 3970" vary depending on the sales period, and each one has a beautiful and refined design that has captivated many Patek Philippe fans.
Before we get into the main topic, let's talk briefly about the Ref. 3970.
The second generation of the perpetual calendar chronograph model was the Ref. 2499. Its successor, the Ref. 3970, was released in 1986.
The case size of the "Ref.2499" is 37.5mm, while the "Ref.3970" is 36mm, which may seem a little small to some, but its appearance and presence make it feel by no means small. While around 40mm is considered the standard for recent models, I feel that there are particularly many fans who prefer and are looking for this classical size, which gives the watch a more cohesive look.
The dial design is exquisitely balanced, with a small calendar window at the 12 o'clock position, registers at the 3 and 9 o'clock positions, moon phase at the 9 o'clock position, date display on the outer edge, and minute scale around the outer edge of the dial.
I think the differences and characteristics between generations in this area are what appeal to enthusiasts.
The first generation was produced in only 100 pieces, and had a closed snap-back case back. The sub-dials were a different color from those of the successor, creating a classic look with a strong contrast.
*There is also a model called "Ref. 3971" that was released around the same time. This model had a sapphire skeleton case back.
The second generation was manufactured from 1986 to 1991.
The leaf-shaped hands and bar indexes remain the same as the first generation, but the sub-dials are now the same color as the dial. Most of the case backs are closed with a screw, but there were also models with skeleton backs made very late in the production period, and the "Ref. 3970EJ-051" we are introducing today is one such watch. The "leaf hands" with their classical feel were only seen on the first and second generations of the "Ref. 3970," and since the production period was short at just five years, there are very few of them on the market, and we think many people are looking for them.
The third generation, "Ref. 3970E", then appeared.
The dial index changes from baton to triangle type, and the hands change from leaf hands to baton hands. The "Ref. 3970" itself is extremely rare on the market, but I think this generation is the one with the most production.
As an aside, the "E" in "Ref. 3970E" stands for "etanche," which is French for "waterproof." The watch is screw-down and comes sold with both a closed back and a sapphire crystal see-through back.
*There are various theories, but one theory is that it was created in response to a series of individual orders from customers for the "Ref. 3970" model skeleton back.
Now, let's get back to the main topic.
The warranty card for the "Ref. 3970EJ-051" has a sales date of September 1991, but if you read the four letters printed at the bottom of the card, you will find that it was manufactured in July 1991. This consistency is surely what will tickle the fancy of watch enthusiasts.
The third generation "Ref.3970EP" has diamond-set indexes instead of triangular ones (only the 12 o'clock position is baguette-cut).
This dial is only available on PT (platinum) cases, and combined with the glossy black dial, it is a model that exudes a seductive and adult sensuality.
The location of the hallmark varies depending on the production period and generation, but one of the most popular features is that it is engraved on the side of the lug. There are also many models that have the hallmark engraved on the back of the lug.
The 13mm thickness is plump compared to the 36mm case size, and the cute shape is irresistible. I think this thickness is one of the reasons why the watch doesn't feel small. The crown, engraved with a Calatrava cross that is large compared to the case, also has a strong presence.
The renowned "Cal. CH 27-70 Q" is based on a movement made by Lemania and can be viewed through the sapphire crystal back, boasting stunning beauty.
The "Ref. 3970EJ-051" comes with a warranty (September 1991), the pass case and booklets from that time, a closed case back, adjustment pins, and a special "Ref. 3970" box in which to set the case back and adjustment pins, although there is some damage inside, making it a perfect collector's item.
*It was overhauled in August 2024, so you can use it with confidence.
The selling price you are interested in is...
That's what I would like to say, but we received a large number of inquiries just before publishing this article, and the sale ended. We are truly sorry!!
If you want to see the product details, click here
The "Ref.3970EP" also comes with a warranty card (October 1995), a pass case and booklets from that time, a tag with a serial number, an unopened closed case back, adjustment pins, and a box (with damage inside). This is also an unquestionable collector's item.
The selling price is 22,550,000 yen (tax included)
Click here for the product page
summary
What did you think?
This time, we happened to receive two units at the same time, but there are currently almost no "Ref. 3970"s for sale in Japan, and it is even more difficult to find one in good condition with all the accessories.
It will be difficult to get more of this model in stock in the future, so if you are considering purchasing one, we definitely recommend that you do so now!
This time, we've come up with a "hot Patek theory" that will stand up to the hot summer. (laughs) Please take good care of your health and have a great summer!
See you next time!