19 JULY 1906: ROMBLON, ROMBLON to MANILA Single rated Constabulary official mail, 1/2 ounce weight,  bearing 1c Franklin 1903 issue. Backstamped MANILA / JUL 23.

15 MARCH 1906: IBA, ZAMBALES to MANILA Triple rated Constabulary official mail with 2c Washington 1899 issue with black O.B. mixed with 1c Franklin 1903 issue, both with small Type II red O.B. Transit backstamped SUBIC / ZAMBALES / MAR 17 beside MANILA / MAR 19 arrival.

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