Poland
| Country: | Poland |
| Type: | Postage stamps |
| Series: | Polish Science Congress |
| Nominal: | 60 gr |
| Year: | 1951 |
| Size: | 26 x 32 mm |
| Perforation: | comb 12½ x 12¾ |
| Mintage: | 2,131,000 |
Polish Science Congress
 Stanislaw Staszic |  Marie Sklodowska Curie 0.1$ |  Zygmunt Wroblewski and Karol Olszewski 0.49$ |  Marceli Nencki |
 Mikolaj Kopernik 0.1$ |  Congress Emblem |