1960 selection of eight large die proofs, card mounted, some master dies, values omitted, one somewhat soiled, others fine-v.f. (Image)

Est.$250

1920 10c Woman and Boy Watching Plane, used on piece in combination with 3c government adhesive, oval Barranquilla datestamps, v.f., cat. $1750 (Cat No. C2) (Image)

Cat. $1750, Est.$1,000

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

Cat. $4500, Est.$2,500

1920 Flier in Plane Watching Biplane, Curtiss publicity label, lower left sheet corner margin single (this is the label surcharged to create the 1920 Compania Colombiana de Navegacion Aerea CCNA 10c multicolor stamp), v.f., with 2004 Brian Moorhouse certificate (Cat No. C5var) (Image)

Est.$150