1928 Mexico Newer & B/B Covers

5930- 1918, CANANEA, SONORA TO NOGALES, WITH BACK STAMP, 5¢ POSTAGE DUE USED AS POSTAGE. NO BACK FLAP

5934- 1914, #386, WITH POSTAGE DUE 2¢ PAID, WITH #385, TO NOGALES

5926- 1924, 1-2 YUCATAN, MERIDA TO CAMPECHE, VERT. CREASE, ABIERTA POR EL CENSOR LABEL

5945- 1920, REGISTERED FROM MEXICO TO GERMANY

5925- 1919, REGISTERED MEXICO TO CALIFORNIA, WITH #B1-2 PLUS OTHERS