Is this an easy fix?

wsfarrell

Looks like Cousins UK has it. The watch reference is pretty specific (and different from OP's), but I'm assuming that Omega only makes one part with the number 129ST0510.

Archer

I was thinking of this on the tennis court yesterday...

If you remove the current click spring from the case, have a look at the tab that goes into the small hole in the case at 12. Is that tab bent to one side or the other? If that tab has been bent in the direction that the bezel rotation happens, that could cause some misalignment in the bezel itself, as it would shift the location of the tabs, and those are the only things that locate the bezel via the serrations (teeth) on the underside of the bezel...just a thought but might be worth checking...