Болгария
| Страна: | Болгария |
| Тип: | Почтовые марки |
| Серия: | Five-Year Plan of the Economy |
| Номинал: | 4 лв |
| Год: | 1949 |
| Перфорация: | Various |
| Тираж: | 110,000 |
Five-Year Plan of the Economy
 Hydropower Plant, Rila Mountain |  Cement Factory "Giant", Dimitrovgrad |  Farm Machinery Factory |  Tractor |
 Industry and Agriculture 105 руб |