b'51127127C THE FIRST FLIGHT ACROSS THE PACIFIC31 May 1928 (AAMC.122) USA - Australia cover flown by Charles Kingsford Smith, Charles Ulm, James Warner & Harry Lyon in the Fokker FV11B-3M Southern Cross on the first crossing of the Pacific by air franked with USA Washington 2c tied OAKLAND/MAY29/ CALIF/1928 duplex cancel and Australia KGV 1d x2 tied SYDNEY-39/14JE28/NSW arrival cds alongside, plus enclosed Union Oil Company of California letter stating . carried to Australia . on the first trans-Pacific flight made by man, both in fine condition, Cat, $25000.This flight was the first leg of Kingsford Smiths eventual circumnavigation of the worldin the Southern Cross completed in 1930; one of only four covers flown.Ex Frommer, sold for $22,800 in the September 2016 sale of his Grand Prix Pioneer AustralianAir Mails Collection. $16,00020,000'