4c Lincoln
n

Inverted
a

Vertical
Reading Up

Vertical
Reading Down

Slanted
a

4c Lincoln
Right Inverted O.B.

$2 Madison Dark Blue 
MALOLOS /BULACAN / AUG 31 190

ONLY RECORDED $2 MADISON
WITH BLUE O.B.


6c Garfield
a

8c Sherman
a

2 JUNE 1906: SAN JOSE BUENAVISTA, ANTIQUE  to MANILA
44c Multiple rated Philippine Constabulary official mail with blue O.B. on 6c x 7 Garfield issue of 1901
and 1c x 2 Franklins of 1903.

THE LARGEST RECORDED USE OF 6c GARFIELD TYPE I BLUE O.B.

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P-15
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