Nice stamp showing a clear
partial example of a rare
Honolulu General Post Office
postmark (with serifed letters).
This postmark had very limited and uncertain usage
from September 1899 until August 1900,
and appears to be used here as
(the occasional postmark),
rather than an auxiliary mark.
Davey # 282.21, and Post Office in Paradise #
AUXOFF-PostOffice(U). It is estimated that
there are less than 500 known examples.