PT0105. Prototype lens, calculated in 1959 by GOI. Very few samples released by GOI in 1959-1960. Focal length - 2 cm, aperture range f4.5 - f22. Focusing range from 0.5m to infinity. Number of elements/groups: 8/5. Angular field - 92º. Kiev (Contax) mount. An earliest so far known lens has s/n #60036407 (private coll.).
Sample opposite from private collection in Europe.