Rare Mir 1 variation from 1969

seen at: Rare Lens Mir-1 2,8/37 M39 Grand Prix Brussels 1958 Rare Lens Mir-1 2,8/37 (Zenit M39)









http://www.ussrphoto.com/UserContent/3032015_Mir 1 variation 2.png

Certainly "homemade" body, regarding to body and engraved numbers.
Mir-1 were used in several purposes and adapted in many way, for industrial and cine purposes