USSR
0.05 - 0.06$
price on 21.03.2023
| Country: | USSR |
| Type: | Postage stamps |
| Series: | International Quiet Sun Year |
| Nominal: | 4 k |
| Year: | 1964 |
| Size: | 40 x 28 mm |
| Perforation: | comb 11½ |
| Mintage: | 6,000,000 |
International Quiet Sun Year
 Giant Radio Telescope and Sun 0.05$ |  Emblem of International Quiet Sun Year 0.11$ |  Solar Radiation 0.2$ |