1999 DELAWARE 50 STATES
STRUCK ON AN
There are approximately 15
known 1999 State Quarters struck on Experimental Planchets. All five
states in the 1999 series (DE, PA, CT, GA and NJ) have been discovered.
These Experimental State
Quarters have sold for as high as $10,000 each, depending on which
state, the coin's condition and which type of experimental composition
There are four known types
of experimental compositions which have been discovered so far
(November 2001) on 1999 State Quarters.
Type #1 - This type
has the "color" of a Sacagawea Dollar and has a copper
Type #2 - This type
has the "color" of the Sacagawea Dollar but does not
have a copper center core.
Type #3 - This type
has a slight "green" color and has a copper center core.
Type #4 - This type
has a slight "green" color but does not have
a copper center core.
Here are a few
"telltale" signs to determine if you have discovered a State
Quarter on an EXPERIMENTAL PLANCHET in circulation:
WEIGHT - ALL examples
discovered so far are OVERWEIGHT - varying from 5.9 grams to 6.3
SIZE - It will be
slightly THICKER than a regular State Quarter, due to the heavier
COLOR - So far, the
pieces discovered are either the same "color" as a
Sacagawea Dollar, or they have a slight "green hue" to
LOOK - The edge is
slightly rough and may have a higher rim around part of the edge.
EDGE - Some of these
do NOT have a center COPPER CORE.
STRIKE - None
discovered so far are proof-like in the fields.
REEDING - Some of
these have incomplete reeding.
These coins were analyzed
by scanning electron microscophy with energy-dispersive x-ray
spectroscopy (SEM-EDX) to determine alloy composition. The predominant
metal is copper, followed by zinc. There are also small percentages of
manganese and nickel.
PCGS and NGC have both
authenticated and certified these 1999 State Quarters as being struck on
In a recent Freedom of
Information Act (FOIA) request for copies of any reports and test
results, the Department of the Treasury acknowledged that "the U.S.
Mint conducted engineering and metallurgical tests as part of its
development of an alloy for the Golden Dollar", but would not
release any information.
Images courtesy of the Byers
PCGS MS-63 (illustrated
above). Mike Byers Numismatic Corporation, offered for sale in
November 2001 for $10,000. This Experimental Planchet has the golden
of a Sacagawea Dollar and a copper center core.
and/or recommended reading: