IMHO rebarreled in Switzerland during the 1920s – 30s. The barrel, protruding from the foreend, and the front sight are unlike everything I have seen on a Steyr or other Austrian product. The front base of the Vienna snap mount of the 4x Kahles Mignon scope was most likely transferred from the original M1908 8x56 barrel and soldered on the new 9.3x53 one. These scopes and mounts were offered as a “factory option” by Steyr during the 1920s.