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What does third-party grading mean?
Ian Russell on Wed, Mar 23, 2011 11:04:25 AM
There are three major grading services accepted and recognized by GreatCollections. These are:
PCGS (Professional Coin Grading Service)
NGC (Numismatic Guaranty Corporation)
ANACS
Please, note there are literally dozens of other third-party grading services that have turned up over the past few years. Many of these are not independent and do not offer guarantees on the services they provide.