Friend of mine has a Hamilton Model 23 Chronograph with broken staff.

I assume the staff would be same as 992B but even those staff has three different pivot sizes.

Can anyone tell me the right part number for the watch?

The serial number of the watch is #P11105.

Thank you.

I found that Otto Feri & Jules Borel site has staff for 4992B
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Hamilton 4992B Part # 22BB58B Staff, balance old numbers 659 & 607048
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Does any one know if the staff fit Model 23?

Please let me know your oppinion.

Thank you.
Yasuyuki

I'm going to suggest that you talk with an expert on these watches. Larry Crutsinger at (757-587-9659)

www.militarywatchmuseum.com

Larry will know, and probably have in stock, the exact staff you will need. I seem to recall that the 992B staff will not fit, but I am not sure of this.

THANK YOU ED!!

I will try to contact Larry.

I appreciate your help.