Cog Wheels, Transformer and student

Cog Wheels, Transformer and student
OwnerNelida Fernandez Besada
Observationsstamp printed by Czechoslovakia, shows P?ones, the transformer and the student, circa 1979
CountryCzechoslovakia
Face value20h
Year1979
StateUsed
StatusInterchangeable
CategoryScience
FormatLandscape
Colormulticolor
Other informationPerforated stamp
visualizations255