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CategoriesBonded Coins Broadstrikes Brockages Counterbrockages Die Adjustment Strikes Die Caps Die Trials Double Denomination Double/Multiple Strikes Dual Countries 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. |
