The Yashica Minister III is a fixed lens rangefinder from the early 1960s. I have been unable to pin down an exact date, but the previous Minister II was introduced in 1962. It features a 45mm f/2.8 lens with a coupled rangefinder.
The selenium meter cell is located inside the filter ring on the face of the lens, thereby facilitating automatic compensation for any filters or attachments. The meter reads on the top of the camera body, and this value is then transferred to a ring on the front of the lens. The camera has a sort of mechanical shutter-priority automation: adjusting the exposure ring changes aperture to match the set shutter speed. Adjusting the speed will cause the aperture to automatically change.
I don't remember where I got my example. I think it was a flea market find. I've already shot a roll of Fuji 400 color for this week and dispatched it to Old School Photo Lab.
I haven't found a manual, but here's one for the similar Minister II