1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c yellow, blue, green, red and black, unused, very fine and very rare, cert. APS (Yv. 5, ?4'000) (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c brown, green, red and blue, unused, very fine and very rare (Yv. 7, ?7'000) (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c yellow, blue, green, red and black, unused, very fine and very rare (Yv. 9, ?5'000) (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c yellow, blue, green, red and black, together with 3c red (Sc. 358 tied by violet Cartagena 23 Feb. 1920 cds on FIRST FLIGHT cover from Cartagena to Barranquilla, arrival backstamp, very fine, very rare, cert. Calves and PF (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA Complete set of 5 values (Yv. 10/14), plus set of 4 values in se-tenant pair showing INVERTED surcharge 0.20 and 0.30 (Yv. 15/18 var.), plus three unrecorded showing violet "-30 cvs" surcharge on three different 10c green, unused, very fine, scarce group (12 stamp) (Image)

1920-22 SCADTA "VALOR 10 CENTS" on 50c green, signed A.Brun, plus "VALOR 30 CENTS" on 50c green, plus "30 cent." on 10c yellow signed Champion, all mnh, very fine, rare (Image)

1923-28 SCADTA 20c Grey with double impression variety, Barranquilla cds, couple of faint tone spots, fine, signed Kessler and Cole, ex Batley (SG 40b, Sanabria 81b) (Image)

1929 SCADTA cover to Bogota with 1923 10C plus 1923 20C with "Br." (Brazil) handstamped consular overprint, plus 5C national issue tied by Barranquilla cds's, very few covers known with this stamp on cover (Image)

1935 III Olympiada, complete set of 16 values from 2c to 10p, mnh, very fine, scarce (Image)

1859-1980s, Interesting collection with a strong range of the first issues imperfs in good condition from the Grenadine Confederation incl 2 1/2c green, 5c violet, 10c red brown, through to straight line background, 10c and 25c, followed by a beat up 10c blue of the large arms and then good condition of further imperfs through to the 1880s 20th Century also well represented ending with back of the book and Colombian States incl. Antioquia, Bolivar, Cauca, Cundinamarca, Santander and Tolima (Est. ? 300/500)