Chile, Airmail, 1927, 40c on 10c-2p on 10c O'Higgins Surcharges Complete, in combination with required government franking on oversized cover to Santiago, all tied by "Valparaiso, 23.Feb.28" airmail cds's, receiving backstamp, Very Fine, a scarce complete set issued specifically for air post service between Santiago and Valparaiso. Scott No. C1-C5  Estimate $500 - 750. $0 (Image)