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radio & telegraph inventors design type

  • Colnect-447-280-Nikola-Tesla-1856-1943.jpg
  • Colnect-2878-458-Alexander-S-Popov-1859-1905.jpg
  • Colnect-2878-461-Eduard-Branly-1844-1940.jpg
  • Colnect-447-283-Guglielmo-Marconi-1847-1937.jpg
  • Colnect-447-284-Heinrich-Hertz-1857-1894.jpg
  • Colnect-3201-588-E-H-Armstrong-1890-1854.jpg
Short desc: radio & telegraph inventors




Used by 6 stamps: (See all uses as list)

Czechoslovakia 12/7/1959 25h d=Nikola Tesla (1959) perf=11.75x11.25
Czechoslovakia 12/7/1959 30h d=Popov (1959) perf=11.75x11.25
Czechoslovakia 12/7/1959 35h d=Branly perf=11.75x11.25
Czechoslovakia 12/7/1959 60h d=Marconi perf=11.75x11.25
Czechoslovakia 12/7/1959 1k d=Hertz perf=11.75x11.25
Czechoslovakia 12/7/1959 2k d=circuit diagram & Edwin Armstrong perf=11.75x11.25




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