I've got a vintage Tissot that belonged to my grandfather. I'm not sure when it was made or what model (guessing 1930s from the serial number). I was wondering if anyone could offer me any information such as
How old the watch might be?
What movement it has and where I can get the movement serviced (it hasn't been used in at least 30 years).
As for the caseback the markings include 717 959 (a model number? serial number?)
Thanks for your help and sorry for the lousy pics (I'm trying to get better at 'em).