Air Post stamps and covers. 1920-21, SCADTA, Airplane over Magdalena River, complete set in blocks of four, most with sheet margins, slight usual gum wrinkles, post office fresh, full OG, NH, VF, C.v. $1,100 as hinged singles (Image)

Air Post stamps and covers. 1923-28, Seaplane over Magdalena River and Bogota Cathedral, complete set in sheet margin blocks of four, including registration stamp, full OG, NH, VF, C.v. $817.40 as hinged singles (Image)

Air Post stamps and covers. 1953, Ministry of the Communications Building, set of three values, each one with double surcharge ''Aereo'' and new denominations, full OG, NH, VF, each one with Kessler guarantee hs on reverse (Image)

SCADTA Pioneer Flight covers. 1921, cover from Bogota to New York, franked by 3c green, paid for surface delivery and uprated by violet air mail surcharge 30c on 50c pale green, appropriate SCADTA three-line and circular handstamps, mostly VF, A. Rendon certificate, C.v. $625 as for a stamp off cover (Image)

SCADTA Pioneer Flight covers. 1924, mixed franking cover from Hamburg to Bogota, franked by five German adhesives and Colombian 30c blue with ''A'' overprint in horizontal strip of four, upon surface arrival to Colombia posted to Flight ''Barranquilla - Girardot'' and then for ground delivery to Bogota, underpaid and marked ''T. 0.30'', arrival ds, minor conveyance flaws, still F/VF, mounted on page from a Collection (Image)