Stamps of Czechoslovakia, IGY issue
1 to 3 of 3
postage
1957, Dec 20 IGY issue unwmk
| X | 30h | radio telescope & observatory, p. 11.5x11.25 | ||||
| X | 45h | Lomnicky Stit Meteorological Station | ||||
| X | 75h | Sputnik 2 over Earth, p. 11.5x11.25 |
1 to 3 of 3
| X | 30h | radio telescope & observatory, p. 11.5x11.25 | ||||
| X | 45h | Lomnicky Stit Meteorological Station | ||||
| X | 75h | Sputnik 2 over Earth, p. 11.5x11.25 |