World Esperanto Congress, Sofia 13 ст — Bulgaria, 1963
World Esperanto Congress, Sofia (Bulgaria, 1963), face value 13 ст. Photo, catalogue value, details and photo identification.
- Issue date
- 1963
- Face value
- 13 ст
- Colors
- Multicolor
- Print run
- 300,000
World Esperanto Congress, Sofia (Bulgaria, 1963), face value 13 ст. Photo, catalogue value, details and photo identification.