Lot
600 
Colombia, 1919, 2c carmine rose, "1er Servicio Postal Aereo 6-18-19" overprint, sound single, on flown corner card cover from Barranquilla to Puerto Colombia, cds cancels dated "Jun 18 1919", Very Fine, very rare with only 160 covers flown; signed Sanabria. Scott No. C1; $1,700 for faulty off cover Estimate $500 - 750.
Realized: $400