1919 First experimental Flight Baranquilla - Puerto, used, very fine, very rare, cert. PF 1949 & 2006 (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c orange, blue, green, red and black, unused, thin else very fine, very rare, cert. Feldman (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c yellow, blue, red, brown and black, unused as issued, very fine, very rare (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c yellow, blue, green, red and black, unused as issued, very fine, very rare, signed Kessler (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c yellow, blue, green, red and black, unused, very fine, very rare, cert. PF 2002 (Image)

1920 COMPAÑIA COLOMBIANA DE NAVEGACION AEREA 10c red (2 different) in block of 12, crease through one row of 3 stamps and one stamp with hinge, all signed Champion & Kessler, and 10c green (2 diff.) in block of 8, crease through on row of 4 stamps, fine (Image)

1923-28, SCADTA 17 complete sets of 12 values bearing various ovpts : A, B, D, E, EU, F, GB, H, I, P, S, Su, V and hand ovpt : A-U., Bo., Br., Pe., mint o.g., very fine, scarce (204 stamps) (Image)