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18 JANUARY 1906: ZAMBOANGA, MINDANAO to MANILA 2 ounces weight Constabulary official mail, postage paid with 4c Lincoln 1901 issue with Type XI O.B. in black. Backstamped MANILA / JAN 23. BLACK TYPE XI O.B. UNCOMMON ON COVER |
13 JUNE 1906: DAGUPAN, PANGASINAN to MANILA 3c rated Constabulary official mail for 1-1/2 ounces weight, franked with 1c Franklin with Type XI red O.B. and 2c WAshington 1904 issue without official marking. Backstamped MANILA on the same day. |
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