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6 JANUARY 1906: DUMAGUETE, NEGROS ISLAND to MANILA Douuble rated Philippine Constabulary official mail with blue O.B. on 2c Washington 1903 issue. EARLIEST RECORDED USE OF 2c WASHINGTON TYPE I BLUE O.B. |
MANILA to DAGUPAN, PANGASINAN |
CATBALOGAN, SAMAR |
TACLOBAN, LEYTE |
BACOLOD, NEGROS OCCIDENTAL |
CABANATUAN, NUEVA ECIJA |
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