USSR
1.6 - 1.9$
price on 03.03.2023
Unique serial number at bottom left.
| Country: | USSR |
| Type: | Postal blocks |
| Series: | KOSPAS |
| Nominal: | 50 k |
| Year: | 1987 |
| Material: | coated |
| Size: | 63 x 81 mm |
| Perforation: | frame 11½ |
| Mintage: | 800,000 |