USSR
3.1 - 3.7$
price on 03.02.2023
Unique serial number at upper right.
| Country: | USSR |
| Type: | Postal blocks |
| Series: | Space Exploration |
| Nominal: | 2*50 k |
| Year: | 1972 |
| Material: | Chalk surfaced |
| Size: | 91 x 71 mm |
| Perforation: | Imperforate |
| Mintage: | 350,000 |
Space Exploration
 Space Exploration - "Venera-8" & "Mars-3" 3.1$ |  Space Exploration 0.94$ |