A mass produced SLR from the former Soviet block,
from "KMZ" (Krasnogorsk) c1967-1981, and then
"BeLOMO" (Belarus) c1975-1986. Reportedly about
8 million copies, and several 'brand names'. This
camera has the Olympic logo; handy for dating it.

"Built like the proverbial tank", this model has an
instant return mirror, but an aperture pre-set screw
mount (M42) lens of interesting design. Shunned by
many as 'inferior' to the earlier KMZ model, this BeLOMO
model came with a heavy black leather case, and was
purchased, in working condition, at a 'flea market' for $5.