[govann]

Hello all,
I was looking for a 6138A centre chronograph seconds wheel and I found a part number 888621 instead
The number I need is 888611
Now I am having a hard time working out the calibre for part no 888621.
The HT if this pinion is 8mm . The 888611 is supposed to be 8.8mm
Any help will be appreciated.
Thanks.

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[Vette Enthusiast]

My 74 Seiko parts guide does not list a part 888621. I wonder if the seller has the numbers transposed. 888612 is a part number used for the 6139B cal movements. As mentioned above, you need 888611 for 6138A and B. These are hard to find and not inexpensive. Expect to pay upward of $150US.

 

[govann]

Yes, I think so too.
I need to compare it with a proper one from a 6139B.
Thank you.