⌚ Horlogerie Collection ⌚
This is a old UMF Ruhla sub-second ca. 1950's with a 15 jewels caliber UMF 2 / UMF M2. UMF Ruhla was a German watchmaker.
The specifications of the UMF Cal. M2; here.
If you want to read more about the history of UMF Ruhla; here.