cazalea
[Seiko Moderator]
20932
That's a tough one
Hi Dan,
Thanks for the inquiry. I wish it was an easier question!
I did a quick scan over my watch supplier's parts database.
SEIKO MOVEMENTS
They show 1271 different Seiko movements - I'm not sure where they get the base data but possibly with some cooperation with Seiko.
SEIKO CASE NUMBERS
The case numbers are related to the movements, as one is used along with (inside) the other.
The number of case variations ranges from 1 to about 750 different items, at least in the data that I reviewed, for ONE movement family.
The worst I saw was the 7Txx-xxxx with 747 variants.
I chose a sample movement series 80xx-xxxx
SEIKO COMPONENT PARTS
I went through a small range of Seiko cases with different end digits, but the same 3rd digit in the front half of the number. For just these 5 watch case numbers,
8024-0020
8024-0040
8024-0100
8024-0240
8024-0250
I found varying stem lengths (case diameter), the hands were different colors and part numbers (styling), the crowns could be white or gold tone (styling), and several caseback gaskets differed (Case diameter & materials); there were different crystals (diameter, bezel, quality).
FOR EXAMPLE - SEIKO 5 MODELS
The website Watchsleuth records over 1500 Seiko 5 models. Here is some wallpaper which (if enlarged) would show you all those watches.
Personally, even though I am a Seiko fan, I'm afraid the magnitude of your quest is MUCH larger than can be justified in reducing the risk of a Frankenwatch. That is, unless you find a way into the Seiko hidden lair of production specs. And if you did, I think is highly unlikely:
A - that they would let you in even with the right "secret knock"
B - that they would let you out alive if you got the data
C - that you would be sane if you did emerge
Cazalea
This message has been edited by cazalea on 2015-06-01 13:22:18
Trying to learn about the numbering system for vintage GS cases
Hello, I am trying to learn more about vintage Grand Seikos. Currently have a basic understanding of the numbering system for their vintage movements (i.e. 4420, 4520, 4522, 6145, 6146, 6156, 6185, etc.) I have a tougher time finding more information abou...
That's a tough one
Hi Dan, Thanks for the inquiry. I wish it was an easier question! I did a quick scan over my watch supplier's parts database. SEIKO MOVEMENTS They show 1271 different Seiko movements - I'm not sure where they get the base data but possibly with some coope...
Thank you Cazalea
I was hoping that if looking at just Grand Seiko, the task might have been simpler. I can't imagine all the permutations that would cover all of Seiko! I started thinking about this because I've noticed watches where the number on the dial does not match ...