Czechoslovakia
0.09 - 0.11$
price on 06.12.2022
Design illustrates maximum sun-spot activity.
| Country: | Czechoslovakia |
| Type: | Postage stamps |
| Series: | International Quiet Sun Years and Space Research |
| Nominal: | 20 h |
| Year: | 1965 |
| Size: | 44 x 27 mm |
| Perforation: | comb 11¾ x 11¼ |
| Mintage: | 4,100,000 |
International Quiet Sun Years and Space Research
 Sun´s Corona 0.09$ |  Sun 0.07$ |  Exploration of the Moon 0.07$ |  Space Ships Rendezvous 0.08$ |
 Space Station 0.63$ |  Exploration of Mars 0.07$ |  Soviet "Kosmos" and US "Tiros" Satellites 2.3$ |