Getting closer, but it wasn't made by Walther or in Russia or the old Eastern Block. For hints, it's a striker-fired, blowback design with three safeties -- a magazine safety which blocks firing when the magazine is removed, a grip safety (which could really use a beaver-tail enhancement), and a frame-mounted manual safety. At one time or another, this model was adopted and issued by the military and/or police forces of Yugoslavia, Holland, Greece, Romania, France, Denmark, and Germany (Nazi and Postwar). This one is chambered for 7.65 mm (.32 ACP), and appears to have been issued to the Luftwaffe of Nazi Germany.
If no one wins the "Gold Star" by tomorrow, I'll post the answer then.