C114 - Lawrence and Elmer Sperry

C114 - Lawrence y Elmer Sperry
OwnerManuel Briones
ObservationsElmer Ambrose Sperry Sr. (1860-1930), was an American inventor and businessman, most famous for building, two years after Hermann Ansch?tz-Kaempfe, the gyrocompass and as founder of the Sperry Gyroscope Company.
CountryUnited States
Face value39
Year1985
StateUsed
StatusInterchangeable
CategoryVIP
FormatLandscape
ColorMulticolor
Other informationPerforated stamp Air mail
visualizations67