Newly in to me today is this little beauty. Approximately 33mm including the crown with 15mm lug width. The case is in very good condition, aside from a bit of dirt and some finger prints.
I can't find anything about "Ringo" using the usual methods, and the movement has me stumped as well. There are no markings aside from 17 Jewels. Under the balance is what looks like the Swiss Cross in a shield, and some numbers that I can't make it.
It sort of looks like an FHF 70 or derivative, but I just don't know.
Anyway, here's a look.