Poland
People's Republic of Poland (1952-1989)
Av: Outline of Poland's coastline, in the center INSTITUT MORSKI, above a ship on the waves, on the left an emblem of the Hel of Gdansk, on the sides 1950 - 1975, XXV YEARS, Rw: Wind rose and compass steps, in the corners written the departments which the Maritime Institute deals with, designed and made by Viktor Tolkin
tombak, 69.8 mm, 174.81 g, mintage 1,600 pieces