Zeiss 531 Super Ikonta with a 7cm Tessar. Compur Rapid shutter. New bellows (made myself and work well, but probably the last set of bellows I build).
6 x 4.5 format. Two red windows on back so you wind a number to first window then second window.
Shutter button on top. Albeda (?) finder but it was so dark and tarnished that I stripped it down. So it is basically a clean optical finder, as accurate a need be for this kind of camera.
Photo to follow shortly.
$125 obo, plus shipping ($15 US, others inquire)