Overprinted and surcharged versions of petroleum stamps:
Overprints are imprints added to regular stamps
after initial production for any one of
a number of reasons. Overprints may be handstamped using inked rubber or metal
dies,
or the stamp sheets may be put back onto printing presses to receive the
added inscriptions.
Overprints may be used to commemorate special events, to note changes in governments,
to limit or expand the useage of stamps, to denote stamps produced
for publicity needs,
as well as for a number of other purposes. Surcharges are similar to
overprints except that
they involve revaluation of the stamps — that is, they change the postal
denomination
of the stamps involved. In some cases, the same stamp may be overprinted or
surcharged
on multiple occasions and/or for a variety of purposes.
Examples of stamps overprinted for special events
Examples of stamps overprinted for official government use (also shown elsewhere)
Examples of stamps overprinted as specimens
(also shown elsewhere)
Examples of stamps overprinted for changes in
useage
Examples of stamps that received multiple overprints/surcharges: Pakistan
, Argentina, modern
Azerbaijan, Iraq, Qatar
Examples of stamps surcharged primarily to
change currency or denominations
Examples of stamps overprinted for other reasons
Examples of postal stationery that received multiple overprints/surcharges:
Abu Dhabi/U.A.E.
© Peter A. Scholle, 2000
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