Please consider donating to help offset our high running costs.
Then you’ll have fun looking through this
https://omegaforums.net/threads/145-006-145-016-seamaster-chronograph-research-thread.77145/
Then you’ll have fun looking through this
https://omegaforums.net/threads/145-006-145-016-seamaster-chronograph-research-thread.77145/
I think this is the thread to look at - and weep.
https://omegaforums.net/threads/not-all-321s-are-speedmasters.22332/