Canon started producing the 7 in 1961 as the successor of the VI and the P. It was Canons first rangefinder camera with builtin light meter.
There were 3 incarnations of this rangefinder, the normal one, the 7s, and the 7zs.
These cameras come with a normal M39 mount for lenses, but also have an bayonet mount to accommodate the Canon 50mm/f0.95 ‘Dreamlens’. This was the only camera (back in the day) that supported this lens.
The rangefinder is parallax corrected and has selectable framelines.
This example being offered is in very nice condition, and comes with an aftermarket body cap.