Czechoslovakia
0.05 - 0.06$
price on 27.01.2023
| Country: | Czechoslovakia |
| Type: | Postage stamps |
| Series: | Radioinventors |
| Nominal: | 30 h |
| Year: | 1959 |
| Size: | 44 x 27 mm |
| Perforation: | comb 11¾ x 11¼ |
| Mintage: | 3,200,000 |
Radioinventors
 Nikola Tesla (1856-1943) 0.48$ |  Alexander S. Popov (1859-1905) 0.05$ |  Eduard Branly (1844-1940) 0.12$ |  Guglielmo Marconi (1847-1937) 0.07$ |
 Heinrich Hertz (1857-1894) 0.08$ |  E. H. Armstrong (1890-1854) 0.44$ |