LOT Heritage Rare Coin Galleries  /  2006 October Dallas Signature Coin Auction #428  / 

1980

1999-P 25C Pennsylvania MS67 PCGS. The U.S. Mint condu

Currency:USD Category:Coins & Paper Money Start Price:1.00 USD Estimated At:1.00 - 1,000,000.00 USD
1999-P 25C Pennsylvania MS67 PCGS. The U.S. Mint condu
<B>1999-P<25C> Pennsylvania Statehood Quarter--Experimental Planchet--MS67 PCGS.</B></I> The U.S. Mint conducted metallurgical tests as part of its development of an alloy for what became the Sacagawea dollar. Presumably, quarter-size planchets and dies were more convenient to use than their mini-dollar equivalents. A small number of experimental planchet state quarters are known for each of the five 1999 states: Delaware, Georgia, Pennsylvania, Connecticut, New Jersey. These dies would have been available by early 1999 for production of proof sets. Some of the experimental planchet pieces were analyzed with energy-dispersive x-ray spectroscopy to determine their composition. The predominant metal was copper, followed by zinc, with traces of manganese and nickel present. This lustrous and unblemished yellow-green Superb Gem has streaky, granular surfaces, as made. The rims are particularly striated.
Sign In to Bookmark Lot