USSR
| Country: | USSR |
| Type: | Postage stamps |
| Series: | 50th Anniversary of Popov's Radio Discoveries |
| Nominal: | 30 k |
| Year: | 1945 |
| Size: | 26 x 37 mm |
| Perforation: | line 12½ |
| Mintage: | 2,000,000 |
50th Anniversary of Popov's Radio Discoveries
 A.S. Popov with Worlds' First Radio |  A.S. Popov with Worlds' First Radio |  Portrait of Alexander S. Popov (1859-1906) |