Stamps of Sierra Leone, 175le denom
1 to 40 of 40
postage
1990, Jan 15 Mars a issue unwmk p. 14 (9 stamps)
| - | 175le | multi | Kepler | — | — | |
| - | 175le | multi | Galileo | — | — | |
| - | 175le | multi | Drawings by Huygens in 1672 & Schiaparelli in 1886 | — | — | |
| - | 175le | multi | Sir W Herschel | — | — | |
| - | 175le | multi | Percival Lowell in Arizona 1896-1907 | — | — | |
| - | 175le | multi | Mars | — | — | |
| - | 175le | multi | Mariner 4 1965 | — | — | |
| - | 175le | multi | Mars 2 1971 | — | — | |
| - | 175le | multi | Mars 3 1971 | — | — |
1990, Jan 15 Mars b issue (9 stamps)
| - | 175le | multi | Mariner 9 | — | — | |
| - | 175le | multi | Mariner 9 Phobos | — | — | |
| - | 175le | multi | Cydonia Region | — | — | |
| - | 175le | multi | South polar cap | — | — | |
| - | 175le | multi | Profile of Mars | — | — | |
| - | 175le | multi | Polar cap diff | — | — | |
| - | 175le | multi | Nix Olympica | — | — | |
| - | 175le | multi | Grand Canyon of Mars | — | — | |
| - | 175le | multi | North Pole | — | — |
1990, Jan 15 Mars c issue (9 stamps)
| - | 175le | multi | Olympus Mons | — | — | |
| - | 175le | multi | Viking 1 | — | — | |
| - | 175le | multi | Viking 2 releases Lander | — | — | |
| - | 175le | multi | Lander entering Mars’s atmosphere | — | — | |
| - | 175le | multi | Parachute deployed | — | — | |
| - | 175le | multi | Terminal descent | — | — | |
| - | 175le | multi | Viking lander on Mars | — | — | |
| - | 175le | multi | Soil sampler robotic arm | — | — | |
| - | 175le | multi | Soil Sampler US flag machine | — | — |
1990, Jan 15 Mars d issue (9 stamps)
1990, Apr 27 Olivier
| - | 175le | multi | Beau Geste |
1990, Dec 17 Christmas 1990 issue - paintings (1990 Sierra Leone) p. 13
| - | 175le | multi | Virgin & Child - Giovanni Boltraffio | — | — |
1990, Dec 31 mushrooms (1990 Sierra Leone) p. 14
| - | 175le | multi | Omphalotus olearius |
1991, Apr 8 Easter 1991 issue
| - | 175le | multi | "Sts. Gregory, Maurus and Papianus" - Peter Paul Rubens |
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