Cover franked with 1929 15c on 1c green AIR surcharge issue (SG 117) tied by CRISTOBAL machine cancel dated JUN 21 1929. Flown on the FAM 5 Cristobal - Barranquilla, Colombia first flight with illustrated first flight cachet on front. Addressed to BARRANQUILLA, COLOMBIA with arrival cds on reverse. (Muller #22, AAMC #CZ37a)