Plain cover with manuscript 'Air Mail' at top franked with single 1923 4c blue (SG 395) tied by CARTAGENA cds in red dated JUN 24 1929 with 'El Agente Postal Nacional' handstamp alongside with agents signature below. Addressed to CURACAO with arrival cds on reverse. It is probable that the Agente handstamp was used in lieu of Airmail stamps. An unusual item.