Bulgaria
Stamp from block
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | 13th Congress of the Bulgarian Communist Party |
| Nominal: | 50 ст |
| Year: | 1986 |
| Perforation: | Imperforate |
13th Congress of the Bulgarian Communist Party
 Wavy Lines 0.12$ |  Comet 0.05$ |  13th Natl. Communist Party Congress 0.04$ |  Scaffold, Flags |