Speaking of Omega(Tissot), I was given this watch many decades ago but didn't wear it much if at all. I dug it out recently and wound it up to see if it still runs and it does...with remarkable accuracy. Never been serviced to my knowledge. It's not self winding so requires daily attention but I guess it's an OK watch:
https://www.google.com/search?q=tiss...DVdX7g9-5q7zM: