U.S. Mint Error Coins for Sale:
Sintered and Copper Wash
Called sintered or copper washed planchet error coins, these errors occur when coin blanks are left for an extended period in the annealing furnace. This give time for the dust of previous coins to settle on the blanks, causing a darker appearance.
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1995 P 25C PCGS MS63 100 COPPERWASH OBVERSE REVERSE |  |
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US $399.99 | 2d 4h 40m |
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Error Coin 2004 P Nickel with A Copper Wash | |
0 Bid | US $5.00 | 2d 14h 21m |
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2007 P jefferson improperly annealed sintered ngc ms65 | |
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US $175.00 | 3d 50m |
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2007 D adams sintered planchet pos B pcgs ms66 rare | |
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US $350.00 | 3d 55m |
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2007 P washington improperly annealed sintered ms65 | |
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US $150.00 | 3d 58m |
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2007 D washington Improperly annealed sintered ms66 | |
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US $260.00 | 3d 59m |
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