1929 Charles A. Lindbergh signed first flight cover. Signature on International F.A.M. 6, Brownsville - Mexico City first flight cover flown by Lindbergh, franked with 1928, 5¢ Beacon issue tied by "Brownsville, Tex., Mar 9" machine cancel, purple Brownsville flight cachet, two separate Mexico backstamps indicating cover was from the "Lost Mail" group, Very Fine. Scott No. C11  Estimate $500 - 750. On the southbound flight several bags where stored in the wing of Lindbergh's plane were overlooked and later found while the plane was at Merida on April 9. The mail was later returned to Mexico City where it received a supplementary postmark. $0 (Image)