Stamps of Colombia, 1921 air a issue
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1921 1921 air a issue unwmk (no perf info) (11 stamps)
| - | 5c | yelorg | MI 10 overprinted R | — | — | |
| - | 5c | yelorg | MI 10 overprinted R | — | — | |
| - | 10c | blgrn | MI 11 overprinted R | — | — | |
| - | 20c | MI 13 overprinted R | — | — | ||
| - | 20c | MI 13 overprinted R | — | — | ||
| - | 20c | MI 13 overprinted R | — | — | ||
| - | 30c | grn | MI 14 overprinted R | — | — | |
| - | 30c | grn | MI 14 overprinted R | — | — | |
| - | 50c | bl | MI 15 overprinted R | — | — | |
| - | 50c | bl | MI 15 overprinted R | — | — | |
| - | 50c | bl | MI 15 overprinted R | — | — |
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