This is a very nice Ostara Gents Diving Watch from the 1970's
The Watch is in very good condition, it is supposed to be waterproof to 20 ATM but we strongly advise you to take this off if stepping into your bath ! Never mind swimming in it ! 
The case is chrome plated with a steel back, the rotating outer bezel rotates smoothly, the case itself has only superficial scratches and the dial is immaculate, no signs of wear at all.A couple of scratches on the glass but very minor.
Inside the case is a Swiss 17 Jewel Lever movement 
Cosmetically overall this is in very good condition and running well.