German Dem. Rep.

Date1980, 11 IV
Value1 Mark
Catalog no.Mi 2502, BL58   Sc 2097   SG MSE2223   Y&T BF56
TopicInterkosmos Project
OccasionApril 12, International Cosmonautics Day
DescriptionJoined issue with Bulgaria, Poland, Soviet Union and Czechoslovakia.
On the frame: 5 flags from countries that already send a cosmonaut into space. Among them the Polish flag, because of the space flight of Hermaszewski in 1978. On the stamp: the logo of the Interkosmos-project. The text 'Gemeinsame bemannte Raumfahrtflüge' means: Joint manned space flights.
The Bulgarian stamp was issued on April 22, the other stamps in April 11, 1980.