USSR
0.05 - 0.06$
price on 30.12.2022
Exists on both ordinary and UV reactive paper.
| Country: | USSR |
| Type: | Postage stamps |
| Series: | World Fair EXPO-67, Montreal |
| Nominal: | 4 k |
| Year: | 1967 |
| Size: | 42 x 30 mm |
| Perforation: | comb 12½ x 12 |
| Mintage: | 4,000,000 |
World Fair EXPO-67, Montreal
 Sea-water Distilling Apparatus 0.05$ |  Image of Atom 0.05$ |  "Proton 1" Satellite 0.42$ |