Bulgaria 1971 10th Congress of the Communist Party
From Stamps of the World
- Issue Date : 20 April 1971
- Designed by : Al. Denkov
- Circulation : #2153 x 1,500,000 / #2154 x 2,000,000 / #2155 x 200,000
- Print Process :
- Stamp Size :
- Perforations : 12½
- Bulgarian Catalog Numbers : 2153/55
- Michel Catalog Numbers : 2084/86