Karl Schwarzschild Observatory 20 Pf. — Germany, Democratic Rep., 1975
Karl Schwarzschild Observatory (Germany, Democratic Rep., 1975), face value 20 Pf., “275th Anniversary of the Academy of Sciences in Berlin” series. Photo…
- Series
- 275th Anniversary of the Academy of Sciences in Berlin
- Issue date
- 1975
- Face value
- 20 Pf.
- Colors
- Multicolor
- Print run
- 7,000,000
- Yvert
- DD 1742
- Michel
- DD 2062
- Stanley Gibbons
- DD E1777
- Scott
- DD 1662