1950's Leica. This was a IIIc that my father owned.
He sent it to the factory to be upgraded to a IIIf. I still have the receipt from Leica USA. We both used this camera extensively many years ago. It is a 35mm and I have tried to use it again but it is almost impossible to load film into it! Also the viewfinder and rangefinder are difficult to see with my aging eyes.