Alexander S. Popov (1859-1905), Inventor of Radio Telegraphy
14 k 1925
USSR
1.5 - 1.8$
price on 15.10.2022
(Inventisto de radio) - the world first inscription in Esperanto on stamps.
| Country: | USSR |
| Type: | Postage stamps |
| Series: | 30th Anniversary of Invention of Radio by Alexander Popov |
| Nominal: | 14 k |
| Year: | 1925 |
| Material: | ordinary |
| Size: | 24 x 30 mm |
| Perforation: | comb 13½ |
| Mintage: | 2,000,000 |
30th Anniversary of Invention of Radio by Alexander Popov
 Alexander S. Popov (1859-1905), Inventor of Radio Telegraphy 0.97$ |  Alexander S. Popov (1859-1905), Inventor of Radio Telegraphy 1.5$ |