The 50 anniversary of flight of the stratosphere balloon USSR-1
- Catalog #
- 5413
- Date of Issue
- 1983 25 July
- Denomination
- 20k
- Color
- Multicolor
- Artist
- Bogachev I.
- Paper
- Chalk-surfaced
- Printing method
- Intaglio
- Perforation
- Harrow 12½:12
- Issued
- 4,500,000
- Tags
- Space