PK6800. Prototype camera from former Lomo factory museum. Released by LOMO in 1980-1981 (?) Fitted with K mount bayonet MC Volna-4 1.4/50mm lens #800001. Removable prism with no contacts or electonics as on Almaz-102 camera. The prism release button on the left back side. The metal leaf shutter with speeds: B, 30s, 15s, 8s, 4s, 2s, 1s, 1/2s, 1/4s, 1/8s, 1/15s, 1/30s, 1/60s, 1/125s, 1/250s, 1/500s, 1/1000s. The lightmeter from 10 to 1600 ISO (no GOST). The ligmeter cells are under the miror (auxilliary miror) in the bottom of the camera. IL correction -1, 0,+1, +2. Sockets for motor winder on the camera bottom. 6 volts battery powered lightmeter (and shutter ?). Delay timer (red led in front).
Camera below from Claire&Alain Berry (France) collection.