1917 Mexico Revolutionary Covers

5838- 1915, SOLDIER’S MAIL, MEXICO TO MONTERREY, COLURUN OF GENERAL MASS (?), COLLEGE OF CIVIL ENGENERING, VIA SALTILLO

5842- 1910, 1¢ PC, W/INVERTED 10¢ BARREL

5847- 1915, ADVERTISING ENVELOPE W/#502-503

5849- 1911, LAS PeñAS TO GUADALAJARA

5829- 1915, TLAXCALA TO VERACRUZ, MANY MANY MARKINGS ON BACK