16 MAY 1906: MANILA CIRCULATING
Bureau  of Navigation official mail with 1c x 2 Franklins for double rated at 1 ounce maximum weight.
Stamps supplied by the Philippine Constabulary. Backstamped MALOLOS on the same day.

USE BY OTHER DEPARTMENTS OF CONSTABULARY PRODUCED
O.B. STAMPS ARE UNCOMMON


30 MARCH 1906: LIGAO, ALBAY to MANILA
4c centavos rated  for 2 ounces weight, paid with 1c x Franklins with red O.B. and 2c Washington
with black O.B. Backstamped LEGASPI / ALBAY/ MAR 31 and MANILA / APR 4.

23 MARCH 1906: IBA, ZAMBALES to MANILA
5c rated for 2-1/2 ounces weight, paid with 1c Franklin 1903 issue with red O.B.
and 4c Lincoln 1901 issue without official marking.  Backstamped MANILA / MAR 28.
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< Type I Small O.B. in Purple
Type II Iloilo Marking #1 >