Zenit-B

This mechanical SLR made in 1969 has no light meter, no automatic diaphragm, and only the ground glass screen for focusing. But it does have a focal-plane shutter with exposure times from 1/500 to 1/30 sec and B, which seems to still be working well. The less-than-impressive M42 screw-in lens is f/3.5 and 50 mm.  The lever on the left is for the self-timer - did the owner take selfies back in 1969?