Regular lens "Sonnar" (2/50). After the Great Patriotic War (1941-1945) "Contax III" was produced at the Arsenal plant in Kiev and was called, respectively, "Kiev 3".
Upscale rangefinder camera with a frame format 24x36. The shutter is focal, vertical, with shutter speeds “B”, 1/2, 1/5, 1/10, 1/25, 1/50, 1/125, 1/250, 1/500 and 1/1250. The shutter-cocking and shutter-release knob, unlike the "Contax I", has been moved to the top cover. Viewfinder - optical, combined with a range finder, which, in turn, is associated with the drive rotation of the lens. Fastening lenses - bayonet, special for these devices.
Non-conjugated selenium exposure meter to determine exposure.
From @legin