Bulgaria
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | Stamp Exhibition BALKANFILA V |
| Nominal: | 13 ст |
| Year: | 1975 |
| Perforation: | comb 13 |
| Mintage: | 200,000 |
Stamp Exhibition BALKANFILA V
 V. Zachariev: St. Sofia Church, Sofia |  St.Cyril and St.Methodius 0.05$ |  St. Constantine and Helene |