Poland
People's Republic of Poland (1952-1989)
Av: In the background mathematical notation POLSKIE / TOWARZYSTWO / MATEMATYCZNE, top 1919, bottom 1989, Rw: In the background mathematical notation head, above XIII ZJAZD, below POLSKIE MATEMATYKÓW, Border: Nabite ZYCHOWICZ
cast bronze, 94.8 x 87.5 mm, 236.06 g