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postage
1921 1921 issue ovpted on stamps of Upper Senegal & Niger
| X | 50c | ultra & bl | on 50c-ultra&bl (0) | |||
| X | 50c | gray & vio | ovpt, Queen Wilhelmina, w. unwmk, p. 12.5 (1925) |
1926 1926 issue (no perf info)
| X | 50c | scar & grn, grn | boat on Niger River |
1931 Colonial Exposition issue
| - | 50c | redvio | women's heads |
1937 Paris International Exposition issue p. 13
| - | 50c | dkbrn |
1962, Jan 29
| X | 50c | manatee | .20 |
airmail
1942 1942 air issue p. 12.5x12.25
| X | 50c | red & bl | .20 |
postage due
1921 1921 postage due issue ovpted on stamp of Upper Senegal & Niger (no perf info)
| - | 50c | blk | ovpt, numeral |
1927 1927 postage due issue p. 14x13.5
| - | 50c | red | landscape with camel & fort |
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