20 NOVEMBER 1907: MALOLOS, BULACAN to MANILA, 
Using 1c Franklin green on oriental buff 1903 postal envelope with blue O.B. on the indicia.

EXTREMELY UNCOMMON ON POSTAL ENVELOPE


22 NOVEMBER 1906: LUCENA, TAYABAS to MANILA
With 4c Grant issue of 1903 with inverted blue O.B., thickness of character a fraction
under 1.0 mm.Backstamped MANILA / NOV 23.

EXTREMELY UNCOMMON INVERTED O.B. ON 6c GARFIELD

Frame 5 / Page 70
< Type VIII Black O.B.
P-67
P-68
P-69
P-70
P-71
Type VIII Red O.B. >