Just bought a Pentacon six slr medium format camera with the P6 bayonet mount. Previously owned a Kiev 6C, clunkier but left handed. Like me. The Pentacon is the East German answer to Quality MF camera. The lens I have are Carl Zeiss Jenna. Extremely good optics. When I finish rebuilding my darkroom I'll post some photos.
My first Pentacon Six was very good. I foolishly sold it, later bought two more, which both had frame spacing problems even after CLA. The technician told me the frame spacing cannot really be adjusted on this camera.