M mount which can fit all the Leica m including digital as well with good image results especially in black and white. It works really well on my M9-P, even the M-P 240. The lens is in excellent condition, scratches free, only some Cleaning/Coating marks on the front element which is showing on the images above when is held against a bright light.
S Front Cap is not the original. Feel free to ask questions, thanks! The item "Leitz Leica Summicron Collapsible F2 5cm 50mm v1 M mount vintage lens" is in sale since Saturday, October 27, 2018. This item is in the category "Cameras & Photography\Lenses & Filters\Lenses". The seller is "edwardchow95" and is located in Leeds.This item can be shipped to United Kingdom.