COLOMBIA, 1921, "Valor 30 Centavos" on 50c Pale Green, Hooked "L" in "Valor", Black Air Post Surcharge (Colomphil 22; Scott C20 var).
Sheet margin at top, tied by "Sociedad Colombo Alemana de Transportes Aereos (Compania Anonima)" four-line handstamp of Barranquilla, used with National 3c (faulty) on 1921 cover to Bogota, National stamp tied by Bogota datestamp on arrival, cover with faults incl. edge tears, creasing and file fold just affecting 30c stamp, still Fine, this is the only example
recorded of this variety used on cover, only eight used examples are known in total with no unused examples recorded
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