Public Auction 281 Thursday, 20th October, 2011

2152 1921 Sociadad Colombo Alemana 10c on 50c dull green, "VALOR 10 CENTAUOS", Junkers Hydroplane over River Magdalena, "1" of "10" inverted. VF MLH. Yv 24 cat €1200, Sc c18 cat $12,50, SG 4 cat £1300, A$4300 MUH. 1993 Rendon AIEP photo-cert (P) $300 $500

2153 1921 Sociadad Colombo Alemana 30c on 50c dull green, Junkers Hydroplane over River, opt in violet at Neiva (Type 2). VF MLH. Sc C20 cat $925, Yv 23b, SG 6 cat £1000. Exp Galvez (P) $300 $500

2154 1921 Sociadad Colombo Alemana 30c on 50c dull green, Junkers Hydroplane over River Magdalena, error opt INVERTED, opt dark blue-black. F-VF U, tropical spot. Sc C20, Yv 23A, SG 7 cat £850 for normal. Very rare as only 1 cover & 2 stamps recorded. 2010 Bortfeldt AIEP photo-cert (P) $300 $500