1931, RUSSIA, Reopening Flight Leningrad-Berlin: 5 different stamps (Sc.#438/40, B54, B56), tied by special cds Leningrad-Berlin, 5.V.31, applied on Colombia preprinted 4 C ultramarine stationery envelope uprated with Colombia 2 x 1 C green & 2 C carmine (Sc.#340/341) and with Scadta International Airmail issue 5 C yellow, 10 C brown and 15 C green (Sc.#C68-C70), tied by cds S.C.A.D.T.A.Buenaventura, 25.V.1931, addressed to Cali in Colombia with appropriate transit and arrival marks. VF condition. Exceptional combination and usage of Scadta stamps - only very few examples are recorded! (Image)

1921, airmail issue 'Servicio Postal Aereo de Colombia' part set of 10 up to 3p. violet all in blocks of four from upper left corner, mint never hinged but most with typical gum faults, scarce blocks! Mi. € 1.400,-- ++ (Image)

1925, 5 C orange yellow, complete sheet with 25 stamps and 20 C grey registration "R" stamp with margin imprint, together with Colombia 2 x 4 C violet and 10 C blue registration stamp, mixed franking on large size registered airmail cover from Bogota, 3.XI.1925, addressed to Moscow in Russia, cover unclaimed and russian "undeliverable" label applied, finally redirected to Bremen in Germany, arrival mark (12.12.25). Envelope and stamps with some blemishes as should be expected, otherwise fine condition. Very unusual Scadta airmail cover! (Image)

1923, CANADA: Colombia airmail issue with black handstamp 'CA.' 3p. purple and 5p. olive both mint never hinged and registration stamp mint lightly hinged and with typical gum faults, signed and Raybaudi certificate (1996) for the 3p. and 5p., rare stamps! Mi. € 1.850,-- (+ 100% for the MNH stamps) (Image)

1923, BELGIUM: Colombia airmail issue with black opt. 'B' complete set of 12 incl. registration stamp, mint lightly hinged and signed Raybaudi, scarce set! Mi. ~ € 610,-- (Image)

1923, SPAIN: Colombia airmail issue with black opt. 'E' complete set of 12 incl. registration stamp, mint lightly hinged or with typical gum faults (5c. without gum), scarce set! Mi. € 688,-- (Image)