dshao1
373
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 about the numbering system for their cases. I've seen 3 basic case styles the most often:
-7000
-8000
-9000
What confuses me a little more is what the 3rd digit represents in this numbering system. (i.e. -8020, -8040, etc.). Does this 3rd digit signify a case design difference, or maybe a dial difference. Seeing many items online, I'm trying to understand the system and identify possible "frankenwatches".
Thank you for any light you can help me shed on to this matter.
Best Regards, Dan
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That's a tough one
By: cazalea : June 1st, 2015-13:14
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
By: dshao1 : June 1st, 2015-22:29
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 ...
