Poland, People's Republic of Poland (1952-1989), Warsaw. Medal 1960, International Philatelic Exhibition, like MMP 60/81 (only in gold), like Paszkowycz 9/60 (only in gold), designed by W. Jastrzębowski, issuer: Polish Philatelic Union, Main Board, Warsaw Bronze 32 mm, weight 11,12 g., Condition UNC/aUNC, medal from the collection of Stanislaw Niewitecki, an outstanding Polish numismatist.
Extremely rare, probably a trial bronze struck from a medal in the small size of 32 mm, in gold only and only struck about 5 pieces, the catalogue mentions gilt trials in this size and an edition of 2 pieces.