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CategoriesBonded Coins Broadstrikes Brockages Counterbrockages Die Adjustment Strikes Die Caps Die Trials Double Denomination Double/Multiple Strikes Dual Countries Dual Mint Marks Essay Trial Strikes Experimental Blanks Experimental Strikes Experimental Surface Feeder Finger Strikes Foreign Coins Struck on U.S. Planchets Galvanos Gold Die Trials Gold Errors Gold Off-Metals Hub Trials Indents Intentional Errors Martha Washington Test Pieces Mated Pairs Mules Multiple Errors Off-Centers Off-Metals Overstrikes Pattern Die Trials Pattern Errors Pattern Mules Plaster Models Platinum Errors Proof Errors SMS Mint Errors Specimens Spectacular Errors Struck Scrap Struck Thru Transitional Errors Two-Headed Coins Two-Tailed Coins Uncanceled Dies Uniface Die Trials Unique Coins |
  Proof ErrorsThis proof Bicentennial Dollar major mint error is unique in many ways and has no equals. It is the only known double struck with the second strike off-center. There are no off-centers known, no off-metals known, no mated pairs known, and no double denominations known. |
