COLOMBIA, 1920, 30c Black on Rose - Oct. 20, 1920 Barranquilla-Girardot Experimental Flight (C14).
Tied on large piece by excellent strike of violet "Servicio Postal Aereo, S.C.A. de T.A." oval "Colibri" (hummingbird) cancel,
clear Oct. 20, 1920 Girardot circular datestamp below, cover originally addressed to Bogota, Extremely Fine and rare, only two strikes
of this cancel are known on the 30c value (other is single, ex Goeggel), this cancel was used only on the Oct. 20, 1920 flight from Barranquilla to Girardot, the use of the 30c is quite peculiar since this was the only flight requiring a 50c surcharge prior to a contract with the Colombian government reducing it to 30c, hence nearly all known examples are on the 50c value
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