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
Trying to learn about the numbering system for vintage GS cases
