1c Franklin Block of 6

Vertical Reading Downwards O.B. 
on Positions 5 and 6

2c Washington Red Plate Block of 6
BOTH THE LARGEST RECORDED MULTIPLES
EXTREMELY UNCOMMON

1906 FEBRUARY 27: DUMAGUETE, NEGROS  to MANILA
Double rated Constabulary official mail, 1 ounce maximum weight, with black Type III O.B.
on 2c Washington. Backstamped MANILA / MAR 5.

EARLIEST RECORDED USE OF SMALL TYPE III BLACK O.B.
Black 1
Black 2
Black 3
Black 4
Black 5
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