United States
0.21 - 0.25$
price on 16.11.2022
U.S. unmanned accomplishments in space. Pioneer 10 passed within 81,000 miles of Jupiter, Dec. 3, 1973. Mariner 10 explored Venus and Mercury in 1974, and Mercury again in Mar. 1975
| Country: | United States |
| Type: | Postage stamps |
| Series: | Space Issue |
| Nominal: | 10 ¢ |
| Year: | 1975 |
| Perforation: | line 11 |
| Mintage: | 159,000,000 |
Space Issue
 Mariner 10, Venus and Mercury 0.21$ |  Pioneer 10 Passing Jupiter 0.12$ |