1919 2c carmine rose, h.r., large margins all around, beautiful color and intact perforations on all sides, faint toned speck, still v.f., pencil signed, with 1958 BPA certificate (issued for the First Experimental Air Mail Flight, Barranquilla to Puerto Colombia to Barranquilla by American aviator William Knox Martin, June 18, 1919. On this occasion, 200 copies of 2centavos stamps were overprinted at Barranquilla Printing Office. This was executed in horizontal strips of ten, which were severed with a guillotine knife, causing horizontal perforations to have a "cut" appearance. Of the total stamps issued, 160 were used on covers on the special flight) cat. $3500 (Cat No. C1) (Image)

Cat. $3500, Est.US$1,500

1920 10c "Woman and Boy Watching Plane", unused without gum as issued, margins all around, beautiful colors, fresh, v.f., signed Kessler, Calves, etc. 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 Clouds and Small Biplane at Top, unused without gum as issued, large margins all around, small hinge thin, signed Champion, still a v.f. stamp, quite difficult to find in sound condition, only 27 unused examples have been recorded, cat. $4500 (Cat No. C3) (Image)

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

1920 10c Flier in Plane Watching Biplane, used, large margins all around, rich colors, fresh and v.f., only 100 printed, cat. $1750 (Cat No. C5) (Image)

Cat. $1750, Est.US$1,000

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

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

1920 20c on 10c carmine, two different, unused without gum, v.f., signed Champion, rare, cat. $500 (Cat No. C11F,G) (Image)

Cat. $500, Est.US$200

1921 10c on 50c green, violet surcharge, unused without gum, incredibly well centered, v.f., cat. $1500 (Cat No. C17) (Image)

Cat. $1500, Est.US$750

1921 10c on 50c green, 30c on 50c green, two different used, fine, cat. $1775 (Cat No. C19,23) (Image)

Cat. $1775, Est.US$500

1921 30c on 50c green, l.h., usual centering, fine stamp, signed Forester, cat. $925 (Cat No. C20) (Image)

Cat. $925, Est.US$250

1921 30c on 50c green, violet surcharge, canceled on piece, fine, signed Kneitschel, cat. $950 (Cat No. C24) (Image)

Cat. $950, Est.US$300