COLOMBIA, 1921, "Valor 30 Centavos" on 50c Pale Green, Damaged Violet Air Post Surcharge (Colomphil 23; Scott C20 var).
Sheet margin at right, lightly struck Girardot oval cancel, Very Fine and rare, this surcharge is distinguished by use in Girardot and damage to lettering of surcharge, only four covers
and two used singles have been recorded
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