The lens comes in OCT-19 mount for Russian 35mm film movie cameras like Konvas-2M. Can be used with other cameras if you have corresponding adapter (non-reflex only due to long rear part).
The prime was made in 1980 (s/n 800189). f/2, T/2.2, focuses from 0.6m.
The lens is in very good used condition.
Aperture ring is jerky in one position (about T/5.6), and sometimes blades don't close further though ring moves. So, some repair is necessary (shouldn't be complex). Diaphragm blades are covered with oil.
Focus ring works smoothly, with even effort to turn in the whole scale range.
Glass is OK, but there are some coating loss spots near edge of the front element.