#C6, 1929, 50c on 10c Green, a marginal block of four from the right of the sheet, mint n.h., gum irregularities as typically found in the Scadta issues, of no significance at all, very fine; Scott $2,800+ (Image)

Est. $500-750

#C18, 1929 1s Rose, plus National Post 10c, on two commercial covers to Bogotá and Cali, tied by airmail c.d.s of Guayaquil, showing Colombian Buenaventura transit c.d.s., one with additional Cali datestamp, all being Scadta c.d.s.'s, very fine. (Image)

Est. $200-300

#C18, 1929 1s Rose, used single with additional national postage on three covers, two sent to Colombia and one infrequently sent to London, a very fine and scarce trio. (Image)

Est. $300-400