Registered airmail cover franked with 1948 15c green and pair 2c green with 'CORREOS' overprints national issues (SG 688 & 690) plus 1950 5c yellow, 2 x 10c vermilion, 15c blue, 20c violet and 30c green AIR issue with large 'A' overprint of AVIANCA (SG 1/5) all tied by CORREO AEREO ARMERO cds's dated DEC 16 1950 with boxed 'AVIANCA RECOMENDADO CORREO AEREO ARMERO' registration marking alongside all in black. Addressed to BELGIUM with transit marks on reverse.