The lens was made at Russian KMZ factory in 1950's (#006104).
16 diaphragm blades (more than in the later OKS6-75-1 version) give perfect bokeh. Cine optics gives soft image. 75mm focal length is one of the best choices for portrait photography. The lens covers full 35mm frame (24x36mm) easily (though it was purposed for 35mm film movie cameras). Depth of field is shallow enough to separate an object from background clearly, that gives excellent impression and add cine-like feeling to a video shot with such lens. Combine all this factors, and you'll understand why so many people hunting for such lenses to adapt them for their DSLR's and camcorders.
T/2.2-32. Focuses from 1m.
Very good used condition.
Mechanics is smooth.
Glass surfaces are fine, but there are many dust particles inside. Cleaning is recommended.