Bulgaria
0.21 - 0.25$
price on 01.12.2022
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | 20 Years artificial Earth Satellites |
| Nominal: | 25 ст |
| Year: | 1977 |
| Perforation: | comb 13½ x 13 |
| Mintage: | 250,000 |
20 Years artificial Earth Satellites
 Astronauts in Space, Earth Hemisphere 0.16$ |  American Space Probe Mariner 6, Planet Mars 0.21$ |  Soviet Space Probe Venera-4, Planet Venus 0.21$ |