Or I think its art deco. Its rectangular and I guess from 1930s but maybe someone in the know could tell me from the movement number. Ticking on nicely, plenty of service marks inside case so well attended for years it seems. Antimagnetique on back of case which has a 830 *** number

Maybe I tad small for me, but I like it anyway.

 

Nice catch indeed! Caliber T20 I think. Your movement serial dates it to 1937.

 

Thanks @Vitezi it says Omega ebauche on Ranfft, is it a Omega calibre?

 

In the early days of the SSIH merger Tissot borrowed some of the Omega designs for the movement plates and bridges, it seems primarily for their ladies watches and mens tanks. Tissot would then make improvements as needed. In Estelle Fallet's book Tissot: 150 Years of History (page 83) she writes:

 

That is a superb example! Seldom see such watches with such a clean dial.

 

Thanks, it sure is, I was pleasantly surprised to see the condition when I got the watch in my hands. How it can be compared to other such watches I wouldn't know. This is a first for me.

 

It's a lovely piece of kit no doubt and now that it's only ever going to be worn on an ad-hoc basis you really don't have to worry too much about it except to get it serviced. You might get your watch guy to check the back of the dial for any marks indicating a re-dial if you're unsure. most dial refinishers would mark the back of the dial.

comparison wise perhaps some of its counterparts from Alpina or Cyma or if you're from the good 'ole US of A then Waltham or Elgin (15 jewel movements). that particular era has some real value and quality.