Proof Set - Coin Community Forum

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Author	Replies: 5 / Views: 1,458
Craftworker Valued Member United States 87 Posts	Posted 09/22/2015 9:16 pm For a lot of years I have read in books, magazines, web sites that U.S. Mint Proof coins were special. The coins were double/triple struck, examined for quality, etc., etc. I have found several error coins in various Mint Proof sets as of late. I found a dime in a 1979 "clear S" proof set with a lamination error and also a quarter in the 2015 silver ATB Proof set with struck through wires or strings. So much for quality control. Has anyone else had such discoveries? Inquiring minds want to know. Report this Post to the Staff

SilverStackerKid Pillar of the Community United States 6478 Posts	Posted 09/22/2015 9:29 pm I don't think the dime is a matter of quality control. The lamination most likely happened after it left the mint. As for the struck through? It is probably a small quality control problem. I found a proof 2009 quarter struck through a retained thread. Report this Post to the Staff
Numisma Pillar of the Community United States 4963 Posts	Posted 09/23/2015 12:44 am Pictures, please? Report this Post to the Staff
Craftworker Valued Member United States 87 Posts	Posted 09/23/2015 12:55 pm Sorry no photos, Numisma. I intended this post as a "I'm just saying" post. Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 09/23/2015 1:33 pm I don't think they check for struck through thread errors. I've seen it many times on proof coins I've examined. Most of the time I put them back into the tubes. (I save only strong examples in a tube for images) Edited by coop 09/23/2015 1:34 pm Report this Post to the Staff
Numisma Pillar of the Community United States 4963 Posts	Posted 09/24/2015 5:57 pm That's fine, Craftworker. I must say, though- I didn't realize proof errors like struck through thread were that common. Report this Post to the Staff
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