Smena range finder, made by LOMO.
By some reasons Smena range finder usually associated with Smena bakelite cameras made by some manufactory.
These rangefinders actually were intender for variety of uses on many industrial, topographical, geodesies, and military equipment as well as for photography.
They made from cast aluminum and have very good optics and can make precise distance measurements.
Smena range finders were made in black and gray colors (hammered paint) .
Later LOMO was produced plastic version of Smena range finder with name BLIK