1930 Mexico Newer & B/B Covers

5936- 1960, #909 ON FIRST DAY COVER, NICE AND CLEAN

5941- 1933, CERTIFIED WITH 2 AIR MAIL STAMPS + 1 SURFACE STAMP TO GERMANY

5938- 1935, (1) PAIR AND (1) SINGLE ON REGISTERED COVER TO LONG BEACH, CA, PROOFS USED AS POSTAGE

5937- 1930, REGISTERED (2) #671 ON COVER, MONTERREY TO AUSTRIA

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