Came across this old camera and purchased it for $100 on a whim. It is a Leica D.R.P. Ernst Leitz Wetlar? No.201942
It is in a very vintage leather wrap marked Canon and Made in Occupied Japan.
The lens is a Canon camera Co No 23695 Serenar 50mm and appears to fit well as if made for the Leica body.
Any ideas on this one? Figured I might give it a try at that price. not sure if it is really collectible or not.