In blue, red, black and purpe printer or stamp pad ink.
Square instead of dot or period after “O” and “B”.

Produced at Philippine Constabulary Headquarters, Manila,using handstamping
dies provided by the Bureau of Printing. The stamping   device capable
of marking 10 stamps at a time (5 stamps x 2 rows).

Used in Manila and in the provinces of Albay, Antique, Bataan, Batangas,
Benguet, Bulacan, Cagayan, Camarines, Capiz, Cavite, Ilocos Sur, Iloilo,
Isabela, Laguna, Lepanto & Bontoc, Leyte, Negros Occidental,
Negros Oriental, Nueva Ecija, Nueva Vizcaya, Pangasinan, Romblon,
Samar, Surigao, Tayabas, Zambales and Zamboanga.

ERU:  January 3, 1906 at Capiz Province
LRU:  November 20, 1907 at Bulacan Province
 
Size: 12.0 x 4.0 mm
ISSUE
REFERENCE #
REMARKS
1c Franklin  ST1-BL-213 4
2c Washington  ST1-BL-214 4
2c Washington  ST1-BL-214b Booklet Pair
3c Jackson ST1-BL-215 4
4 ST1-BL-215-B  Inverted
5c Grant ST1-BL-215 4
10c Webster Type II  ST1-BL-217A 4
15c Clay  ST1-BL-218 4
4c Lincoln ST1-BL-220 4
4 ST1-BL-220-B  Inverted, pair right stamp inverted O.B.
4 ST1-BL-220-C Vertical reading up
4 ST1-BL-220-D  Vertical reading down
6c Garfield  ST1-BL-221 4
8c Sherman  ST1-BL-222 4
$2 Madison  ST1-BL-224  On piece
1c Franklin ST1-BL-226 4
4 ST1-BL-226-B Inverted
4 ST1-BL-226-D Vertical reading down 
2c Washington ST1-BL-227 4
4 ST1-BL-227-G  Double O.B., on pair
3c Jackson  ST1-BL-228 4
4c Grant ST1-BL-229 4
5c Lincoln  ST1-BL-230 4
4 ST1-BL-230-B Inverted
4 ST1-BL-230-D  Vertical reading down
6c Garfield ST1-BL-231 4
8c M. Washington ST1-BL-232 4
10c Webster  ST1-BL-233  Plate strip of 4
4 ST1-BL-233-B Inverted
4 ST1-BL-233a Red brown
4 ST1-BL-233a-B Inverted
50c Jefferson ST1-BL-236 4
44 ST1-BL-266-B  Inverted
$2 Madison ST1-BL-238 4
$5 Marshall  ST1-BL-239 4
2c Washington ST1-BL-240 4
2c Washington PSE  ST1-BL-U8 4
1c Franklin PSE ST1-BL-U20 4
2c Washington PSE ST1-BL-U24 44
LARGE O.B.
S-1
S-2
S-3
S-4
S-5
S-6
S-7
S-8
S-9
S-10
S-11
S-12
SMALL O.B.
L-1
L-2
L-3
L-4
L-5
L-6
OFFICIAL BUSINESS
OFFICIAL MAIL
1907 EXPERIMENTAL