1906 - 1938 POST OFFICE OFFICIAL SEALS
ISSUE OF 1906
Lithographed on Unwatermarked Paper. Perforation 12.

Light Brown
OX1
ISSUE OF 1907
Watermarked "PIRS" in Double-Lined Capitals
Perforation 12

Light Brown
OX2

Unlisted Red Brown
OX2a
Hyphen-Hole Perforation 7

Orange Brown
OX3
ISSUE OF 1911
Hyphen-Hole Perforation 7.
OX5 Exist on Unwatermarked Paper
Yellow Brown
OX4
Olive Bistre
OX5
Yellow
OX6
ISSUE OF 1913
Unwatermarked
Hyphen-Hole Perforation 7
Unwatermarked
Perforation 12
Watermarked "USPS" Single-Line
Hyphen-Hole Perforation 7
Yellow
OX7
Yellow
OX8
Yellow
OX9
ISSUE OF 1934
Unwatermarked. Rouletted.
NO IMAGES YET
Dark Blue
OX10
Dark Blue
OX11
ISSUE OF 1938
Unwatermarked. Hyphen-Hole Perforation 7.
NO IMAGE YET
Dark Blue
OX12