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Tools of Counterfeit Detection
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$1 gold piece added mintmark alloy altered coins Altered U.S. Coins American Numismatic Association ANA's Money Talks authentication bell-like bills cast counterfeits circulation coin's surface collectors color commemorative coins copper copy Counterfeit and Altered counterfeit coins counterfeit detection crisp Date Alteration DATE MINTAGE MELTED denticles diameter and thickness die-polish lines dime edge electrotype Emanuel Ninger embossed mintmark Engraving Flying Eagle cent genuine coin Genuine Reverse gold coins half eagle hanger host coin issued Josh Tatum Liberty loss of detail MAJOR DIAGNOSTICS MELTED MINTAGE PRICE MINTAGE MELTED MINTAGE mintmark alterations mintmark style Miss Liberty's mold nickel Ninger Numismatist obverse and reverse paper money Peace Dollar planchet polish Proof Pending Remarks repeating depression scanning electron microscope scratch seam silver dollar spark erosion specific gravity specific gravity test struck counterfeits Struck from One-To-One told on ANA's tool marks U.S. Mint VDB cent whizzed XXVI Olympiad