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Breen letter A document, usually one page, written or typed by Walter Breen giving his opinion on a particular numismatic item.
Breen letter
A written or typed document by Walter Breen rendering his opinion on a particular numismatic item. Prior to 3rd party certification, this was a common method collectors and dealers used to authenticate a unique item.
Breen-Gillio ...
Often heard in context of Breen letter, Breen said, Breen wrote, and so on. Walter Breen's personal life dimmed the impact he had numismatics. Sadly for him and his victims, he was serial pedophile.
 See also: Surfaces, Precious metal, Mirror, Alloy, Nickel
  
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