2006 Proof Set S Mint Quarter Set Red Mark

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Author	Replies: 6 / Views: 757
Finnbarr New Member United States 3 Posts	Posted 02/15/2024 10:25 pm Have a 2006 quarter proof set that is sealed never opened a case has no fogging. 2 quarters have a localizer reddish stain or hue. One is on the shoulder of the bison of the North Dakota quarter and the other is on the cliff face to the Colorado coin. And ideas what's up? If it's environmental I thought all 5 coins would have it? Report this Post to the Staff

Errers and Varietys Bedrock of the Community United States 73579 Posts	Posted 02/15/2024 10:48 pm To CCF! Very interesting. Errers and Varietys. Report this Post to the Staff
muddler Pillar of the Community United States 7184 Posts	Posted 02/15/2024 11:07 pm The silver proof coins from this year are 90% silver and 10% copper. possibly a poor alloy mix for your coins. Report this Post to the Staff
Tacc Pillar of the Community United States 3535 Posts	Posted 02/16/2024 11:44 am Likely just improper alloy mix with that red area being higher Copper content. I have seen this on Silver proof set coins before. Report this Post to the Staff
jbuck Moderator United States 187446 Posts	Posted 02/18/2024 3:01 pm to the Community! Coin Collector Since 1978 Avatar Old Avatar 7070 Eisenhower Australia Canada World CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
Dearborn Moderator United States 94636 Posts	Posted 02/19/2024 12:40 pm This is the first time I have seen copper showing through on a 90% silver coin.. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
Tacc Pillar of the Community United States 3535 Posts	Posted 02/19/2024 2:05 pm Quote: I have seen this on Silver proof set coins before. ...admittedly I was just assuming about it being an improper alloy mix. Would like to know if there's a known reason for it. Report this Post to the Staff
	Replies: 6 / Views: 757

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