The Prima accepts the standard Contaflex magazine back, the Alpha and Beta don't. They could also use and right angle magnifier (20.1614 for $17.00), cassettes (20.0300 for $6.00) and take up spool ( 20.0001 for $0.45).
These lenses took S27 (screw in) and A28.5 (slip on) filters, Proxar close up lenses and lens shades.
The Pro-Tessar 35mm lenses came in f/3.2 and f/4 varieties.
The 85 Pro-Tessar lenses also came in f/3.2 and f/4 varieties. The 85/4 is illustrated above has a couple of spots of separation.
The 115/4 Pro-Tessar, with bubble
A couple of lenses exhibiting separation, which in the Pro-Tessar lenses has a rainbow like look.
A set of lenses in the bubbles. It is common for the bubbles to have lots of cloudiness and scratches.
The Steritar mounted on a Contaflex Super Old Style.
A look at the back of the mount.