First published April 12, 1977; part of a 7-stamp commemorative set.
This particular one is from April 20, 1977.
This Cuban stamp is commemorating the 20th anniversary of the first artificial satellite (āXX Aniversario del SatĆ©lite Artificial 1957ā1977ā).
Iād appreciate it if someone could write in the comments a theory about what kind of satellite this is. Thanks š
The smaller inset image is a reproduction of a Polish stamp (āPOLSKA- miÄdzynarodowy rok geofizyczny 1957ā1958 ā) from 1957ā1958 about the International Geophysical Year.







