Speedmaster chronograph fails at 59 seconds & stops watch

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Yes that photo sucked. I tried to find a better one but it wouldn't upload.
It's all good! Two quick points.
: we don't know the history? Right? Recently serviced/not serviced? I don't know.....
I can almost guarantee you that one of two things are the problem when the watch stops at exactly at 58,59 seconds mark.
1. Not adjusted correctly. The 7750 is a tank it takes a lot to stop it.....
Or
2.need cleaning.

#1 is more likely

This is what I know without seeing the watch.

Anyway if you get stuck with a watch problem just ask. I'm a good problem solver.

Peace

If you read the entire thread and look at the photos closely, there is evidence that the watch is in dire need of servicing.

I appreciate you offer to assist with problem solving, but I think I'll be okay. 😉

Cheers, Al