Hi, I own a 1973 Speedmaster Mark IV that came on a 1170 bracelet with 631 endlinks. I’ve never seen these end links before on a Mark IV, but they appear original and fit the case perfectly. Is this rare or was it intended for another model? Thanks.

 

According to this great list, the 1170 / 631 bracelet belongs to a Seamaster 166.0068.
The bracelet for a Speedmaster Mark IV 176.0012 is 1161 / 172.
https://omegaforums.net/threads/case-bracelet-endpiece-list.81618/

 

Very helpful. Thank you.