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1970 S Proof Set. Really Strange Toning! What Caused It?

 
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 Posted 02/12/2019  12:13 am Show Profile   Bookmark this topic Add ccobb to your friends list Get a Link to this Message









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 Posted 02/12/2019  12:57 am  Show Profile   Bookmark this reply Add jimbucks to your friends list Get a Link to this Reply
Air pollution at the mint.
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 Posted 02/12/2019  03:35 am  Show Profile   Bookmark this reply Add basebal21 to your friends list Get a Link to this Reply
The packaging. Most US mint packaging is destructive to the coins.
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 Posted 02/12/2019  04:38 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
The mint holder and poor storing environment. The cent has a premium because of the toning,more than a little common. Check the bay for sold values.
John1
( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971
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 Posted 02/12/2019  07:58 am  Show Profile   Check GrapeCollects's eBay Listings Bookmark this reply Add GrapeCollects to your friends list Get a Link to this Reply
I kind of like the toning on the Cent
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 Posted 02/12/2019  08:47 am  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply

Quote:
Air pollution at the mint.
No.


Quote:
The mint holder and poor storing environment.
Correct. The lens is not truly sealed, that is, it is not air tight. The environment where the set is stored can affect the coins.
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United States
6 Posts
 Posted 02/12/2019  08:49 am  Show Profile   Bookmark this reply Add P&G to your friends list Get a Link to this Reply
That is called target toning. I have found it to be mostly on the 70S proof sets. But, I imagine that it can be found on other years also. Some of it can look real hazy and not attractive. Yet I have seen some that really pop and have great eye appeal. Like the Cent in your set.
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 Posted 02/12/2019  08:59 am  Show Profile   Bookmark this reply Add thisistheshow to your friends list Get a Link to this Reply
The cent obverse is great, but some of the reverses look nice as well imo.
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 Posted 02/12/2019  09:03 am  Show Profile   Check chafemasterj's eBay Listings Bookmark this reply Add chafemasterj to your friends list Get a Link to this Reply
I like the toning. Nice LMC.
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 Posted 02/12/2019  09:08 am  Show Profile   Bookmark this reply Add T-BOP to your friends list Get a Link to this Reply
This toned proof Lincoln is odd indeed .I'm sure there is a collector out there that would pay dearly for it .
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 Posted 02/12/2019  10:11 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
It is a well know type of coin.
John1
( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971
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 Posted 02/12/2019  7:33 pm  Show Profile   Bookmark this reply Add sullysullinburg to your friends list Get a Link to this Reply
A mix of whatever chemicals were in that holder, humidity and, heat.
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 Posted 02/13/2019  6:00 pm  Show Profile   Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
The 1970 sets are well known for causing toning. I'd like the see the reverse of that Lincoln, it's a BEAUTY!
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 Posted 02/14/2019  12:37 am  Show Profile   Bookmark this reply Add Dorado to your friends list Get a Link to this Reply
Very nice toning on the LMC!
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 Posted 02/14/2019  01:39 am  Show Profile   Bookmark this reply Add westernsky to your friends list Get a Link to this Reply
Poor packinging and poor storage conditions mostly. Humidity and temperature swings off the charts don't help either.. These are just some of the reasons these sets tone the way the do.

Sometimes it enhances the value. Most of the time it doesn't.
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 Posted 02/14/2019  7:08 pm  Show Profile   Bookmark this reply Add GR58 to your friends list Get a Link to this Reply
If it was just the holder ..
All the 1970 sets would be that way.

I would put it mostly on the Humidity and temputure.

And as Jbuck posted .. the holder is not sealed.
GoldRush58 - GR58
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