Bulgaria
Stamp from souvenir sheet; blue violet frame
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | 30 Years Soviet Space Research |
| Nominal: | 50 ст |
| Year: | 1987 |
| Perforation: | comb 13¼ x 13 |
30 Years Soviet Space Research
 Space Probe "Wega" |  Space Station "Mir" |