This a mid 1970's Doxa Prima Gents Automatic in excellent condition.
The case is silver plated with a steel back, there are hardly any marks on the case at all, the patterned faceted silver disl is in immaculate condition and shows no signs of wear. 
Inside the case is a 25 Jewel Lever Swiss Automatic Movement.
Cosmetically overall this is in excellent condition and running well.