11 JANUARY 1906: PASIG, RIZAL to MANILA
Province of Rizal official mail, the 1/2 ounce weight  paid with  1c Franklin 1903 issue with purple O.B.,
stamp provided by the Philippine Constabulary. Backstamped MANILA the same day.

THE EARLIEST RECORDED USE OF TYPE I PURPLE O.B.


3 MARCH 1907: SAN ISIDRO, NUEVA ECIJA to MANILA
Franked with 1c Franklin 1899 issue for 1/2 ounce weight. Backstamped MANILA / MAR 4.

EXTREMELY SCARCE ISSUE WITH TYPE I PURPLE O.B. ON COVER


31 MARCH 1906: IRIGA, CAMARINES SUR to MANILA
Quadruple rated, 2 ounces weight, properly franked with 2c x 2 Washington 1899 issue.
Backstamped NUEVA CACERES / MAR 31 and MANILA / APR 6.
Purple-1
Purple-2
Purple-3
Purple-4
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