Printed 'Banco Popular Ocana' cover franked with 1954 5c blue, yellow, red & orange brown and 1955 5c deep blue (SG 825 & 853) tied by boxed CORREO AEREO TAXADER OCANA (N. de S.) SOBREPORTE cancel in purple dated 15 OCT 1955. Addressed to BUCARAMANGA. The Taxader service for transporting standard Colombian mail only operated between July 1955 and July 1957 and was terminated due to lack of a government contract. Rare.