Lot 61635 – 1921 “$030c” surcharge on 50c pale green, on cover to Amsterdam, Colomphil 8

1921 “$030c” surcharge on 50c pale green, sheet margin at base, on commercial cover to Amsterdam and tied by “SOCIEDAD COLOMBO-ALEMANA/DE/TRANSPORTES AEREOS” three-line hs in violet, and National Post 5c tied by Barranquilla cds, with dater of the flight applied vertically at right (8.11.1921), vertical filing fold clear of the franking; only six covers are recorded with this stamp, this being further enhanced by the external and rare destination; Colomphil 8.