Bulgaria
Stamp from block
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | 40 Years Danube shipping Convention |
| Nominal: | 1 лв |
| Year: | 1988 |
| Perforation: | comb 13¼ x 13 |
40 Years Danube shipping Convention
 Motor Ship "Russe" |  Motor Ship "Aleksandur Stambolijski" |