For protection, investors and collectors should only buy rare U.S. silver dollar coins that have been graded and certified by the three leading independent coin-grading firms: professional Coin Grading Service (PCGS), numismatic Guaranty Corporation (NGC), independent Coin Grading Company (ICG). These organizations are recognized industry-wide for their accuracy, objectivity and high standards.
These services help to make the market in numismatic Silver dollar coins safer and more liquid. When a coin is graded, it is immediately encased in a tamper-resistant slab and sealed with its certification number and grade displayed.
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