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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2007 P MADISON BLACK GOLD DOLLAR IMPROPERLY WASHED SINTERED MINT ERROR COIN |  |
0 Bid | US $9.99 | 13h 41m |
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ILLINOIS QUARTER ERROR IMPROPERLY ANNEALED SINTERED PLANCHET PCGS MS62 MINTERROR | |
0 Bid | US $75.00 | 17h 47m |
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FULL SINTERED QUARTER | |
0 Bid | US $1.99 | 1d 10h 45m |
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ERROR SINTERED PLANCHET 1999 P JEFFERSON NICKEL | |
0 Bid | US $.99 | 2d 3h 31m |
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1982 P WASHINGTON 25c ERROR IMPROPERLY ANNEALED SINTERED PLANCHETFILLED MINTMRK | |
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US $19.99 | 3d 22h 12m |
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2007 D Washington Dollar SINTERED ERROR Coin | |
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US $299.99 | 13d 5h 56m |
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