A Rare Rietzschel Clack Combined Roll Film/Plate Camera

A 4 1/2 x 3 1/2 inch plate camera which fits inside a roll film holder. The two parts 'dovetail' into each other and are lock and released by a pair of small, incongruous chrome levers just inside the drop front. A very unusual design. Interesting Soviet name and address plate attached, probably that of the retailer. Shutter firing, but slow.