1931 Post and Gatty Round the World Flight. Cover franked with 2¢ carmine tied by "Mineloa, N.Y., June 2, 1931" machine postmark, Berlin postmark and purple Russian flight cachet handstamps, flight corner card signed by pilot Wiley Post and navigator Harold Gatty, Very Fine. AAMC No. 1141 $650. Estimate  $250 - 350. The famous Wiley Post and navigator Harold Gatty made a record round the world flight in their airplane the "Winnie Mae". $0 (Image)