LOMO 2/75mm lens OKS6-75-1 in Konvas/Kinor OCT-19 mount, 840367
This lens was made at LOMO in 1984 (#840367). f/2, T/2.2. The lens has OCT-19 mount and fits Konvas-2M, Kinor-35. Can be used with other cameras if you have corresponding adapter.
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 cine 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.
The lens works fine. Both aperture and focus ring rotate smoothly. Glass is fine, but there are some dust particles inside.