1919 2c carmine rose, used, signed Herbert Bloch, etc., with 1974 Friedl certificate, cat. $1200 (Cat No. C1) (Image)

Cat. $1200, Est.US$250

1919 2c carmine rose, used on piece, v.f., with newspaper clipping of Knox Martin, the pilot who flew from Barranquilla to Puerto Colombia, cat. $1200 (Cat No. C1) (Image)

Cat. $1200, Est.US$350

1920 10c "Woman and Boy Watching Plane", unused without gum as issued, margins all around, beautiful colors, fresh, v.f., with 1965 Philatelic Foundation certificate. Only 38 unused examples have been recorded (Compania Colombiana de Navegacion Aerea was founded September 28, 1919. In February 1920, the C.C.N.A. obtained a franchise to fly between Cartagena and Barranquilla and was authorized to issue its own stamps. This was facilitated by overprinting Compania Colombiana de Navegacion Aerea Porte Aereo and surcharging $0.10 on the Curtiss Aereo Plane & Motor Co. advertising labels. Less than 100 of each of the nine types were produced. These stamps were used on two first flights on February 22, 1920 from Cartagena and returning March 4 from Barranquilla. In July 1920, the air mail concession was passed to SCADTA. The C.C.N.A. ceased to operate in April, 1922) cat. $4500 (Cat No. C2) (Image)

Cat. $4500, Est.US$2,500

1920 10c Woman and Boy Watching Plane, used on piece, upper left corner clipped (not touching design), fine and rare stamp, cat. $1750 (Cat No. C2) (Image)

Cat. $1750, Est.US$750

1920 10c Flier in Plane Watching Biplane, unused without gum as issued, large margins all around, rich colors, fresh and v.f. Only 53 unused examples have been recorded, cat. $4500 (Cat No. C5) (Image)

Cat. $4500, Est.US$1,500

1920 10c Lighthouse, unused without gum as issued, large margins all around, rich colors, fresh and v.f., signed Sanabria. Only 50 unused examples have been recorded, cat. $4500 (Cat No. C6) (Image)

Cat. $4500, Est.US$2,500

1920 10c Condor on Cliff, unused without gum as issued, large margins all around, bright colors, skillfully repaired (left margin added), v.f. appearance and rare. Only 36 unused examples have been recorded (virtually all known copies are cut in at left), cat. $8000 (Cat No. C8) (Image)

Cat. $8000, Est.US$1,500

1920 10c Plane at Rest, unused without gum as issued, large margins all around, typical plate crack at lower left, v.f., with 1965 Philatelic Foundation certificate. A rare stamp, only 41 unused recorded, cat. $4500 (Cat No. C9) (Image)

Cat. $4500, Est.US$2,500

1920 10c Ocean Liner, tied by violet "Compania Colombiana de Navegacion Aerea Agencia de Cartagena" oval, used in combination with 3c brown on cover from Cartagena (22 Feb) to Barranquilla, additional departure pmk alongside, v.f., with 23 February arrival pmk on back, with 1991 Alex Rendon certificate, cat. $2000 (Cat No. C10) (Image)

Cat. $2000, Est.US$1,500

1921 10c on 50c green, double overprint inverted, h.r., some gum toning, fine and rare stamp, signed Oriol (Cat No. C18var) (Image)

Est.US$500

1921 30c on 50c green, unused without gum, thin, fine appearance, signed Rendon, cat. $925 (Cat No. C20) (Image)

Cat. $925, Est.US$250

1921 30c on 50c green, roughly separated at right, used, fine, cat. $575 (Cat No. C20) (Image)

Cat. $575, Est.US$150