Cover franked with 1923 3c blue and 1923 30c blue SCADTA issue (SG 394 & 41) tied by BOGOTA SCADTA cds in red. Addressed to PANAMA with good strike of boxed 'Aproveche Ud el Servicio Postal Aereo de Colombia, Informacion y Estampillas donde Manuel J Castillo G. Ciudad de Panama, Apartade 130' Panamanian consular agents cachet in purple on reverse with blue BARRANQUILLA transit cds and PANAMA arrival cds. Very scarce.