1915 Mexico Newer & B/B Covers

5949- 1935, PORT OF CALL, GUAYMAS – U.S.S. WORDEN

5929- 1913, CANANEA, SONORA, LONE POSTAGE DUE ON COVER – GREAT COVER TO NOGALES,

5936- 1930, WITH FIVE DIFFERENT REVENUES USED AS POSTAGE

5939- 1917, RAIL ROAD CANCELS TO SAN FRANCISCO, CA

5931- 1915, INTERESTING POSTAGE DUE COVER, .10¢ PAID WITH #348