Bulgaria
3.1 - 3.7$
price on 11.02.2023
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | Industrial Plants |
| Nominal: | 40 ст |
| Year: | 1964 |
| Size: | 34 x 25 mm |
| Perforation: | comb 13¼ x 13 |
| Mintage: | 500,000 |
Industrial Plants
 Paper factory in Boukovitza 0.06$ |  Metal factory Plovdiv 0.06$ |  Metalwork in Kremikovtsi 0.08$ |  Petroleum Refinery in Burgas 0.05$ |
 Fertilizer Factory in Stara Zagora 3.1$ |