COLOMBIA, 1921, "Valor 30 Centavos" on 50c Pale Green, Inverted Air Post Surcharge (Colomphil 23a; Scott C20 var).
Used with 50c Pale Green (C16)
vertical pair with bottom right sheet margin on reverse of legal-sized cover and cancelled by Girardot oval cancel, with National 10c pair tied by blue boxed Barranquilla datestamp upon arrival, cover with "The Colombia Railways & Navigation Co., Ltd." handstamp with printed address to Barranquilla, cover with minor file fold not affecting stamps, small piece of corner missing and opened for display, 30c and 50c with light toning around perfs, still Fine and exceptionally rare combination use with the unsurcharged 50c stamps, only three covers
with Colomphil No. 23a are recorded
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