Esa 9162

I believe the Omega 1250 is the only version of the ESA 9162 movement that comes in a gold-tone finish compared to the silver finish with the other versions. That's the main reason I would avoid trying to fit a Tissot or other rebranded movement into an Omega case.

Do you know what's wrong with your current movement? It could be easier to replace just the problem part, as most components should be interchangeable with other 9162s or possibly with the 9164 depending on what the issue is.

One thing to keep in mind is that some non-Omega 9162 variants have the date window positioned between the 4 and 5 o'clock markers. I believe those use a different date disc than the Omega 1250, and your current dial likely would not work with one of those movements.

I would recommend sending the watch to Rob (https://www.accutronwatchpage.com/) if you need a recommendation on where to get it serviced.