By Joshua McMorrow-Hernandez for PCGS …… Occasionally a coin will come into the PCGS Grading Room that simply isn’t eligible for grading. A No-Grade coin might be one that is artificially toned, abrasively cleaned, has very large scratches, has been altered, or has been repaired. Some coins that are extremely rare or are well known […]
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Proper coin conservation is effectively anti-coin doctoring Professional Coin Conservation By Jeff Garrett for Numismatic Guaranty Corporation (NGC) …… Several of my very good friends in Lexington, Kentucky, are involved in the restaurant industry. One fellow was CEO of Long John Silver’s and later Church’s Chicken. Another owns and operates two successful, upscale eateries. Occasionally, […]
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CoinWeek Sponsor and The Coin Course creator Jerry Shaffer teamed up with CoinWeek to produce this great step-by-step demonstration of what happens when you dip and clean vintage silver or gold coins. * * * To the seasoned collector, few things are as heartbreaking as a rare coin that has been cleaned or otherwise altered […]
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Posted by David W. Lange, NGC Research Director This month Dave discusses the difficulty of detecting cleaned copper and bronze coins. My recent column on the mistaken perception held by many that old coin albums will still prompt attractive toning on coins today elicited a great deal of comment from both collectors and dealers. It […]
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