Air mail envelope postmarked February 21, 1928, 6.5 x 3.75, signed vertically in fountain pen, “Charles A. Lindbergh.” This envelope was carried by Lindbergh when he resumed his place as an air mail pilot, with a horseshoe shaped stamp in the left corner reading “Lindbergh Again Flies the Air Mail,” with “Chicago,” stamped in the middle of the horseshoe. In fine condition, with light overall toning and typed Lindbergh notation to lower right corner. COA John Reznikoff/PSA/DNA and R&R COA.