Mamiya C series is a professional level of TLR medium format cameras. They have interchangeable lens system. This feature is on very few TLR cameras like Contaflex TLR and Koni-Omegaflex. Bellows focusing allows extreme close up photography, which is not easy with other TLRs. Auto cocking of the shutter feature is existent only on the C33 and the C330 series cameras.
One of the finder edges is missing as you can see in the photo no 6.
Otherwise, fully working.