25th Anniversary of UNESCO 13 ст — Bulgaria, 1981
25th Anniversary of UNESCO (Bulgaria, 1981), face value 13 ст. Photo, catalogue value, details and photo identification.
- Issue date
- 1981
- Face value
- 13 ст
- Colors
- Multicolor
- Yvert
- BG 2643
- Michel
- BG 3004
- Stanley Gibbons
- BG 2950
- Scott
- BG 2759