Stamps of Colombia, 4 Oct 1920
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airmail
1920, Oct 4 1920 air d issue unwmk (no perf info)
| - | 30c | blk | Landscape with Airplane | — | — | |
| - | 30c | blk | Landscape with Airplane | — | — | |
| - | 50c | grngray | Landscape with Airplane | — | — | |
| - | 50c | grngray | Landscape with Airplane | — | — |
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