Incoming Airmail: 1927 (5 May) airmail cover from Hammond (Indiana) to Barranca-Bermeja with U.S. 2c and 10c Airmail, plus Colombia 1923-29 4c Blue and 1923-28 30c Blue private airmail stamp, all tied by Hammond duplex, with 'SERVICIO DE TRANSPORTES AEREOS/BARRANQUILLA' cds and arrival backstamps (2), also handstruck 'MISSENT'. Interesting combination airmail, roughly opened at left