Lee Roder
I don't know, but the first thing I thought of was that the pistols looked like a Mannlicher Self-loading Pistol Model 1903. But I don't believe that they were ever adopted by the Austro-Hungarian army, or by any armed forces anywhere in Europe. They also kind of remind me of the Roth-Steyr Model of 1907, which was adopted for the Austro-Hungarian cavalry in 1908.