Airmail cover with typed 'Por el primer CORREO AEREO DIRECTO entre BOGOTA) Bucaramanga - conducio por la Empresa SERVICIO AEREO COLOMBIANO "SACO" endorsement at top franked with 1932 10c yellow & 1934 5c brown (SG 433 & 459) tied by BOGOTA machine cancel dated DEC 10 1934. Flown on the Bogota - Bucaramanga first flight by Servicio Aereo Colombiano (SACO) with boxed straight line 'SIN DIRECCION' marking in black on front. Addressed to BUCARAMANGA with boxed arrival mark & cds on reverse. A rare flight. Ex Brian Moorhouse. (Unlisted in Muller).