Zenit VM (BM cyrillic) was the EM companion, without exposure meter a sucessor of the previous model V (B) this camera was aimed to the Phycians to be used in medical applications Several variations exists including endoscopy. Automatic or manual diaphragm operation. Manufacturing year 1972.

Second set of 3 photos is of early Zenit BM with a very rare ERA-6M 1.5/50 lens. From Collection of Steven Berkowitz