20th International Congress of Pure and Applied Chemistry
4 k 1965
USSR
0.11 - 0.13$
price on 21.03.2023
| Country: | USSR |
| Type: | Postage stamps |
| Series: | 20th International Congress of Pure and Applied Chemistry |
| Nominal: | 4 k |
| Year: | 1965 |
| Material: | ordinary |
| Size: | 40 x 28 mm |
| Perforation: | comb 11½ |
| Mintage: | 4,000,000 |