7th ISO General Assembly.

7ª Asamblea General del ISO.
Ownerjosep colomer valls
ObservationsNo. Cat Yvert 3210 series of a valueISO = International Office for Standardization.
CountryRussia
Colection
Face value6k
Year1967
StateUsed
StatusExhibition - Non-transferable
CategoryEvents
FormatLandscape
Other informationPerforated stamp
visualizations383