Dating hi standard pistol
The gun has been in the holster for quite sometime, as the holster has taken the shape of the gun. The seller told my dad that it was carried by some guy during WW2. The non silenced ones, from what I have read, were not issued to military but were either used for competition or training.
When he called me to tell me about his find, he was so excited.DM1975 shows us a nice example of this civilian gun above.