Consular cover with typed 'FLOOD, American Consulate, BARRANQUILLA, Co.' at top left franked with 1950 20c violet with large 'L' overprint (SG 13) tied by CORREO AEREO BARRANQUILLA cds dated 2. V. 1952 with large boxed 'FRANQUICIA POSTAL Art 6, Convencion de Buenos Aires, Septiembre de 1921' official cachet in black alongside. Sent airmail to CANAL ZONE. Unusual.