| COLOMBIA 1920 AIRMAIL - Plane over Mountains 10c red brown Sc C11D mint MNH VF Pen notation on back of the wide left margin. Mint never hinged. |
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| COLOMBIA 1920 AIRMAIL - Plane over Mountains 10c red brown Sc C11D mint MNH VF Pen notation on back of the wide left margin. Mint never hinged. |
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