Ambi-Silette
Manufactured 1957-1961
Coupled rangefinder focusing
Interchangeable lenses
Photo donated by Jim Kubajak

Additional Information provided by Jim Kubajak:
"Frames for 35-50-90mm interchangeable prime lenses in unique bayonet mount. Behind the lens leaf shutter. Small, but heavy, built like a tank. A better-designed bayonet mount than the Leica M series and with lenses probably as good as the Leica's."

Optima 500S
Manufactured 1967-1974
Coupled rangefinder focusing
Non-interchangeable lens (Color-Apotar, Color-Solinar)
Automatic exposure setting from built-in selenium cell.
Photo donated by Jim and Janet's Planet

Silette
Manufactured circa 1953
Non-focusing Viewfinder
Non-interchangeable lens (Apotar)
Leaf Shutter (Prontor-SVS)
Photo donated by Kent Bentzen