1920 10c Scadta, Ocean Liner, v.f., used on the outbound flight cover from Cartagena (oval handstamp) to Barranquilla, used in combination with National 3c, tied by Feb. 22, 1920 double-circle datestamps on cover to Barranquilla, with arrival datestamp on back, fine cover, with 1991 Alex Rendon certificate (catalogue value for used off cover) cat. $2750 (Cat No. C10) (Image)

Cat. $2750, Est.$1,500

1921 (10 Nov) flown cover from Medellin to Bogota, franked with 30c on 50c surcharge (uncanceled), along with regular franking, boxed Medellin datestamps, v.f., with Bogota arrival postmark (Cat No. C20) (Image)

Est.$500

1921 Handstamped in black "Valor 30 Centavos" on 50c green, surcharge inverted, right margin block of four, surcharge double on lower left stamp, few slight gum adhesions, some gum toning and right stamps creased, otherwise fine and very rare, signed Bloch (catalogue value for regular stamps) cat. $3700 (Cat No. C20var) (Image)

Cat. $3700, Est.$2,000