[AI Manga] Episode 14: How far can "movement swapping" go?

監修者 Commit Ginza

Episode 14: How far is a "crown replacement" acceptable?

Kenji
Master! This watch looks perfect from the front!
But from the side, doesn't the crown seem a bit too lively?
Master
That discrepancy is probably a crown replacement.
It's like having the face of a famous Showa-era actor, but with a令和-era plastic surgery nose.
Kenji
Oh, is the crown really that noticeable?
I thought it was just a "works as long as it sets the time" part...
Master
(How many masterpieces have failed the "side profile test" because of that oversight...)

① What is a crown replacement? Small but important for a watch's "side profile"

Master
A crown replacement means that the winding and time-setting knob on the side of the watch has been replaced with a different specification from a later period, rather than the original from that time.

It's often replaced due to wear or for waterproofing.
So "replaced = immediately bad" isn't always true.
However, the impression changes significantly depending on the size, crown mark, thickness, and operating feel.
What changes with a crown replacement
  • Visual impression: Changes the atmosphere and period feel of the side profile
  • Operation feel: Changes how easy it is to wind and pull out
  • Water resistance and practicality: A new genuine replacement can sometimes provide peace of mind
  • Originality: Often a concern in vintage appraisals
  • Impact on appraisal: Can vary depending on the model and era
Kenji
I see...
The crown is like the nose of a watch, isn't it?
It's small, but it greatly affects the overall impression of the face.

② Why is it easy to overlook? We look at the front, but often neglect the "side profile check"

Master
Most people first look at the dial, bezel, and case.
In other words, their eyes go to the "face value from the front."

But the crown is on the side.
It's not prominent in product photos, and often not deeply discussed in descriptions.
That's why it often becomes a discrepancy that's noticed later and slowly sinks in.
Reasons why it's easy to overlook
  • Product photos are often front-focused, with few side views.
  • It doesn't dramatically change the appearance as much as the dial or case.
  • Even genuine replacements can sometimes look out of place.
  • When purchasing, people tend to focus solely on checking functionality.
Kenji
I get it.
It's like when the front of a person in a dating app photo is perfect, but then you see their side profile and think, "Huh?"

③ What to look for? Crown marks, size, thickness, and winding feel can reveal discrepancies

Master
These are the basic things to look for when inspecting a crown.

・Design of the crown mark or engraving
・Diameter and thickness
・Balance with the case
・Feel of winding and pulling out

Precisely because it's a small part, if it's off, that "something is different" feeling becomes very strong.
It's like a classic car having a shiny LED shift knob.
Master's observation points
  • Crown mark: Is the shape, depth, and vintage feel natural?
  • Size: Is the side profile distorted by being too big or too small?
  • Fit with the case: Is there any floating or unnatural gap?
  • Operation feel: Is there any discomfort in the feel of winding or pulling out?
Kenji
Wow...
I want to pinch my past self, who just dismissed it as "just a knob," and make him reflect.

④ Is genuine always reassuring? "Genuine replacement" and "natural appearance of the time" are separate issues

Kenji
But a genuine crown should be reassuring, right?
Like, if it's not aftermarket, it's safe.
Master
That's the important part.
Being genuine and being era-appropriate for that particular piece are separate things.

For example, a genuine replacement crown from a later period is excellent in terms of practicality.
But in terms of vintage atmosphere, it can differ slightly from the "side profile of the original era."

In other words, it's like pairing a kimono with high-end sports sunglasses.
Both are authentic. But whether they "fit the mood of the day" is a different matter.
Kenji
I see...
If I stop at "genuine means it's all good," I'll run into trouble with the side profile.

⑤ How to ask? Just "Is it genuine?" is a bit shallow

Kenji
How should I ask before buying?
Is "Is the crown genuine?" too weak?
Master
It's a very important question, but it's even stronger if you can ask this much.

"Is the crown original to its era? Is there a possibility it was replaced later?
Do the crown mark and size match the age of the watch body?
Are there side photos, close-up photos of the crown, and a description of its operational feel?
If it was replaced to ensure water resistance, can you explain the details of that?"

This will significantly reduce the risk of problems.
Information to gather with questions
  • Is it genuine?
  • Is it original to its era, or a later replacement?
  • Consistency of crown mark and size
  • Side photos and close-up photos
  • History of replacement for water resistance maintenance

⑥ Risks and concerns: Buying without knowing often leads to regret because "the front is great, but..."

Master
If you overlook a crown replacement, this is what often happens later.

・You were satisfied with the front photo, but the actual side profile feels off.
・When reselling, you might hear "it's not bad, but the originality is a bit weak."
・If the explanation is insufficient, there can be a mismatch in understanding after purchase.
・While it might be a plus for practicality, its evaluation can be divided from a collector's perspective.

In short, the crown is small, but it's a part that has an effect later on.
Points to carefully consider
  • For vintage items, originality and practicality often pull in different directions.
  • Genuine replacements are often rational from a maintenance perspective.
  • However, transparency in explanation is very important for sales and appraisals.
  • For items without side photos, it's safer to request additional confirmation.
Kenji
So, until now, I've been
hiring based on the front, but not interviewing the side profile.
Watch selection, romance, hiring—it's all connected now.

Conclusion: Crown replacement isn't "immediately bad." But the "conviction of the side profile" changes

Master
The way to remember it is simple.

The crown isn't just an operating part. It's a crucial part that forms the watch's side profile.
For practical purposes, a later genuine replacement can sometimes be a reassuring factor.
But for collection and appraisal, it's not just about whether it's genuine, but also about era consistency and overall atmosphere.

So, don't just stop at "as long as it works." It's important to also consider whether it looks natural from the side.
Kenji
From today, I won't judge just from the front.
I'm going to be the kind of man who checks from the side and asks,
"Does that crown belong to the same era as the watch body?"
3 things you can do starting today to avoid mistakes with crown replacements
  • Always check side photos, not just front ones
  • Look at the crown mark, size, and balance with the case
  • Check not only "if it's genuine" but also "if it's original to its era" or "if it was replaced later"
NEXT EPISODE
Episode 15: How far is a "bezel replacement" acceptable?
~ The episode where the face is the same, but the frame is too assertive ~
  • What changes with a bezel replacement? "The issue of the frame having a brand new renovation"
  • How to look at font, fading, thickness, and texture
  • The Master's analogy: "Shiny aluminum sashes on an old folk house" theory explodes
Next time, the discomfort around the face will hit all at once!
※ The next episode preview is for dramatic effect. But the bezel's incongruity hits you instantly.

監修者のプロフィール

コミット銀座のロゴ

コミット銀座

2015年の会社設立以来、"高く買い、安く売る"をモットーに、顧客第一主義を徹底。価格面におけるメリットのみならず、お客様が安心して買い物出来る環境づくり、お客様に最適な時計の提案も実現。
徐々にお客様からの信頼も得て、多くの顧客様を抱えることに成功。高い知識を要するヴィンテージロレックスや、パテックフィリップを始めとするハイエンド商材の取り扱いを得意とする、新進気鋭の高級腕時計専門店。

時事ニュースの新着記事

Tags: 時事ニュース