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Handstamped in Red Stamp Pad Ink. Wide Spacing Between "O" and "B", With Serif on "B" Period After "O" and No Period After "B" Used by the Philippine Constabulary only in Balanga, Bataan Province from July to August 1906 
Size: 13.3 x 5.5 mm |
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20 JULY 1906: BALANGA, BATAAN to MANILA 1c rated for 1/2 ounce weight official mail, with 1c Franklin 1903 issue handstamped with red O.B. Backstamped MANILA / JUL 21. |
31 JULY 1906: BALANGA, BATAAN to MANILA 2c rated for 1 ounce weight official mail, with 2c Washington 1904 issue handstamped with red O.B. Backstamped MANILA / AUG 1. ONLY SIX COVERS RECORDED |
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