The Mir-1 is a wide-angle lens, 37 mm, with a maximum aperture of f/2.8. It was made by a number of lens manufactures with a number of camera mounts. This particular one was made by the ZOMZ factory and has a 39 mm screw mount. Some lenses were engraved 'GRAND PRIX' Brussels 1958.
an strange and srange variation from 1969 can be seen in the forum at