MEXICO 1928,  lot 3 covers, 10/01 Mexico Flight Cover on Roessler Envelope - tied 10/1/28 - Mexico City to Neuvo Laredo - also back stamped Loredo, Texas 10/02/28 -13.10.28 Zweisimmen Roessler Mexican Flag label And cover 1929 9/3 Mexico Flight Cover on Roessler Envelope - tied 10/1/28 - Mexico City to  New Kensington. 1937 airmail  cover from Mexico B.CFA Via N.Y. to Calcutta,