"Proton 4" Satellite 20 Soviet kopek — USSR, 1977
"Proton 4" Satellite (USSR, 1977), face value 20 Soviet kopek, “20th Anniversary of Space Exploration” series. Photo, catalogue value, details and photo…
- Series
- 20th Anniversary of Space Exploration
- Issue date
- 1977
- Face value
- 20 Soviet kopek
- Colors
- Multicolor
- Print run
- 6,200,000
- Yvert
- SU 4407
- Michel
- SU 4651
- Stanley Gibbons
- SU 4693
- Scott
- SU 4594