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Lincoln Pennies Proof 1970 1986 19891990 2006

 
 
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Panama
9 Posts
 Posted 04/22/2019  8:22 pm Show Profile   Bookmark this topic Add armandog07 to your friends list Get a Link to this Message
Found six Proof cents, all in its original mint packing, showing what are possible errors which cannot identify as I am new on this.
1970 observe shows a "delamination" in theword UNITED
1986 reverse shows some type of "bubbles"
1989 observe shows a "crisped" surface
1990 reverse shows a weel defined decoloration
2006 observe shows some sort of a high releif next to the date.

Will appreciate commets/opinions







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United States
38655 Posts
 Posted 04/22/2019  8:35 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
1970 could be a carbon spot. (these happened on the copper planchets) Not a plus for the coin. Probably the reason it was spent.
The rough texture is the result of a poor rinse technique. The zinc dust was not rinsed off before the plating happened.
1990 the seal on the proof set was cut and the finish turned colors.
2006 just a gas bubble under the plating.
Richard S. Cooper
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United States
22865 Posts
 Posted 04/22/2019  8:36 pm  Show Profile   Check Errers and Varietys's eBay Listings Bookmark this reply Add Errers and Varietys to your friends list Get a Link to this Reply
#1 shows damage, #2 and #3 show plating issues, #4 shows a stain of some type, and #5 shows a spot from damage as well. No error, here at all.
More information about Die Deterioration? http://goccf.com/t/317950
Retired U.S. Mint Coin Die Set information. http://goccf.com/t/302961
1973 D Lincoln Memorial cent With Recurring Die Subsidence Error Information. http://goccf.com/t/304624
Machine Doubling tutorial. http://goccf.com/t/332421
Die states progression on coins. Scroll down, so you can see the different die state progressions. http://goccf.com/t/325638
Die Deterioration Doubling Tutorial. http://goccf.com/t/336470
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