Handstamped in Violet Stamp Pad Ink. In Thin Characters With  Serif "B"
No period or dot after "O" and "B"

Used only in the province of Negros Occidental


Size: 9.5 x 4.8 mm
1899 and 1904 ISSUES

2c Washington
Partial NEGROS OCC.
Postmark

5c Lincoln
a
a

18 FEBRUARY 1906: BACOLOD, NEGROS OCCIDENTAL to MANILA
Office of the Governor official mail with 2c Washington with violet handstamped O.B., for 1 ounce weight.
Backstamped MANILA / FEB 24

THE ONLY REPORTED COVER

Frame 4 / Page 59
<Type VI Small O.B.
Type VIII Small O.B. >