#949-954 Czechoslovakia - Nikola Tesla and Inventors (MNH)
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$2.90 USD
1959 Inventors in the fields of telegraphy and radio, set of 6. Designs: 25h, Nikola Tesla. 30h, Alexander S. Popov. 35h, Edouard Eugene Desire Branly. 60h, Guglielmo Marconi. 1k, Heinrich Hertz. 2k, Edwin Howard Armstrong and research tower, Alpine, New Jersey