Colombia, 1919, 2c carmine rose, with Surcharge. First air post issue surcharded "1er Servicio Postal Aereo 6-18-19" on flown cover from Barranquilla to Puerto Colombia, cds cancels dated "Jun 18 1919", cover restored per cert, very rare only 160 covers flown, attractive Very Fine appearance; with 2009 A.P.S. certificate, Herzog & Kessler handstamps on reverse. Scott No. C1  $1,700 as used. $0 (Image)