Bulgaria 1963 The 10th Congress of the Young Communists
From Stamps of the World
- Issue Date: 25 April 1963
- Designed by: V. Tomov
- Print Run : #1431 x 1,000,000 / #1432 x 200,000
- Print Process:
- Perforations: 11½
- Bulgarian Catalog Numbers : 1431/32
- Michel Catalog Numbers : 1375/76