Cover franked with 1929 'First Death Anniversary of Emilio Carranza' AIR issue the set of six and 1929 1c brown TX issue (SG 463/468 & 457) tied by SERVICIO AEREO MEXICO D.F. cds's dated 12 JUL 1929, the first day of issue with 'Emilio Carranza Julio 12 1928-1929' commemorative cachet on reverse with additional airplane cachet both in violet. Addressed to PUERTO MEXICO, VERACRUZ. (Muller #33, rated 1000pts)