Printed 'Primer Vuelo Cali - Barranquilla SCADTA' envelope franked with 1927 6c red EL EXPRESO TOBON 'Train' issue (Hurt & Williams #S24) tied by oval EXPRESO TOBON OFICINA DE CALI cancel dated 28 JUN 1932 and pair 1932 1c on 4c blue and 10c red brown 'CORREO AEREO' overprint issue (SG 427 & 414) tied by CALI SCADTA cds dated 29 JUN 1932. Transported by TOBON to the airport and then flown on the Cali - Barranquilla first flight with large boxed 'PRIMER CORREO AEREO TRANSVERSAL ENTRE EL RIO MAGDALENA Y EL PACIFICO' First Flight cachet in green alongside. BARRANQUILLA arrival cds on reverse. Very scarce use. (Muller #91)