Certina DS calibre: 25-36 Pre Turtle back.

This is a very early Certina DS produced someplace between 1958 and May 1960. 

Dial in very good condition. Hadns in good condition.

All stainless steel case measures 36mm w/o crown. Case was not polished during service and is in good condition. Movement in good condition, was serviced by me in Febuary 2018.