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All Forums Category: US Coins and Currency Forums Forum: US Modern Variety and Error Coins

1970 Proof Set. I Know This Is PMD But Whats The Cause?

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Author	Replies: 10 / Views: 166
Cecilia Sowinski Valued Member United States 95 Posts	Posted 01/12/2021 2:59 pm This is the 1970 proof set that I found the nickel with a minor stuck through error on it. These coins have never been out of the case which has been airtight from the mint. There is a cloudy blue tone on some of them. What causes this type of toning? Especially when they been encased as well as in the cardboard covering of the case. Thanks Cecilia Edited by Cecilia Sowinski 01/12/2021 3:01 pm Report this Post to the Staff

That coin dude Pillar of the Community United States 845 Posts	Posted 01/12/2021 3:03 pm Whatever was in the air at the mint got trapped with the coins, the blue is oxidization. My collection: https://en.ucoin.net/uid112788 A friendly coin dude that is here for you! A coin collector from the Midwest USA. I specialize in minting varieties and coin identification. I am online 3+ times every day for 6-12 hours. My best US coin find: http://goccf.com/t/387871 Report this Post to the Staff
Cecilia Sowinski Valued Member United States 95 Posts	Posted 01/12/2021 3:04 pm Oh ok, thanks I didn't know that. Cecilia Report this Post to the Staff
MOS0239 Pillar of the Community United States 848 Posts	Posted 01/12/2021 3:09 pm Quote: This is the 1970 proof set that I found the nickel with a minor stuck through error on it. These coins have never been out of the case which has been airtight from the mint. There is a cloudy blue tone on some of them. What causes this type of toning? Especially when they been encased as well as in the cardboard covering of the case. These sets are not air tight. Submerge it in water and see what happens. NO, DON'T SUBMERGE IT ON WATER! The toning is due to the environment where it was stored. Damp, hot, cold, etc... Let's see the nickel. Edited by MOS0239 01/12/2021 3:27 pm Report this Post to the Staff
Cecilia Sowinski Valued Member United States 95 Posts	Posted 01/12/2021 3:14 pm There is actually a thread about the nickel a few lines down from this thread. Report this Post to the Staff
Cecilia Sowinski Valued Member United States 95 Posts	Posted 01/12/2021 3:16 pm The title of the thread is 1970 Proof Jefferson nickel. Piece Of Thread Fell Into The Die? Report this Post to the Staff
Cecilia Sowinski Valued Member United States 95 Posts	Posted 01/12/2021 3:17 pm I thought set coming from the mint were made airtight. Thats news to me that there not. I guess it makes sense that there not but I always assumed they were Report this Post to the Staff
MOS0239 Pillar of the Community United States 848 Posts	Posted 01/12/2021 3:25 pm Live and learn. Report this Post to the Staff
Cecilia Sowinski Valued Member United States 95 Posts	Posted 01/12/2021 3:40 pm Yes sir thats what life is all about "learning". Report this Post to the Staff
jbuck Moderator United States 94141 Posts	Posted 01/12/2021 4:01 pm Quote: I thought set coming from the mint were made airtight. Nope. What is worse* is that the ones made the last twenty years or so are not even sealed. You can open and close them all you want. * or better when you like to pull them for your albums. Oh, and in case anyone was wondering, most TPG slabs are not air tight either. Coin Collector Since 1978 My Avatar My Old Avatar My 7070 My Eisenhower Dollars CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
John1 Bedrock of the Community United States 37088 Posts	Posted 01/12/2021 7:05 pm It is a chemical reaction to the material the holder is made from. There are "famous" cents that year called bulls eye cents...I think that is what it is called. John1 ( I'm no pro, it's just my humble opinion ) Searched 5+ Million Cents Since 1971 Report this Post to the Staff
	Replies: 10 / Views: 166

All Forums Category: US Coins and Currency Forums Forum: US Modern Variety and Error Coins

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