Bulgaria
Stamp from block
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | IBRA '73, Munich |
| Nominal: | 1 лв |
| Year: | 1973 |
| Perforation: | Imperforate |
IBRA '73, Munich
 No. 1912 with green Imprint |  No. 1912 with gray Imprint |