Hi,You have a Tissot model called the Stylist. It is probably late 60s to mid 70s. I've seen ones in very good condition sell for a little under $150 on a site that is not eBay.
I'm willing to bet it's counterfeit. For some reason, the online market is absolutely teeming with fake Tissots.
* Look at the back of the case - specifically, the lettering around the edge. It is stamped, rather than engraved. Not something Tissot does.
*Notice how, at the bottom of the letters & numbers, the impression is heavy. As you go to the top of the letters the impression gets fainter. The stamping die did not hit the steel at a true 90-degree angle.
* Now compare the faded letters to the crispness of that "T" logo. That crispness is proof that the letters were not worn down by natural abrasion with the skin. [This a textbook example of poor counterfeiting.
* The quality of the case back steel is very poor compared to what Tissot uses.
* To the best of my knowlege Tissot never produced that particular dial design.
* To the best of my knowlege Tissot never honored historical timekeeping with dial illustrations (and a poor illustration as well!).
* Su Sung called it a Water Tower Clock - not a Water Wheel! Tissot would not have made that mistake.
* I'll bet you dollars against donuts there's a cheap south-east Asian movement inside that case.