USSR
0.31 - 0.37$
price on 24.01.2023
| Country: | USSR |
| Type: | Postage stamps |
| Series: | Science in USSR. |
| Nominal: | 20 k |
| Year: | 1987 |
| Material: | coated |
| Size: | 28 x 40 mm |
| Perforation: | comb 11½ |
| Mintage: | 2,600,000 |
Science in USSR.
 Tokamak Thermonuclear System 0.09$ |  Kola Borehole 0.09$ |  "Ratan-600" Radio-Telescope 0.31$ |