This is an Omega Speedmaster “Teutonic”, made in the 1980s in limited quantities for the German market. It is unique for its uncommon case and use of the Omega Cal. 861 movement.
For a great breakdown of these watches, head over to Chuck Maddox’s site here.
This example is in mint condition, with an unpolished case and untouched dial. The original bracelet is in excellent condition with no stretch.