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1988 Penny Looks Like It Has Freckles

 
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 Posted 12/06/2022  5:58 pm Show Profile   Bookmark this topic Add bluejoe66 to your friends list Get a Link to this Message


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 Posted 12/06/2022  6:01 pm  Show Profile   Bookmark this reply Add nick10 to your friends list Get a Link to this Reply
zinc bubbles will do that
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 Posted 12/06/2022  6:02 pm  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
Severe case of zinc rot.



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 Posted 12/06/2022  6:03 pm  Show Profile   Bookmark this reply Add JimmyD to your friends list Get a Link to this Reply
Not uncommon on zincoins.
Once the bubbles break, zinc rot will set in.
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 Posted 12/06/2022  10:34 pm  Show Profile   Bookmark this reply Add datadragon to your friends list Get a Link to this Reply


Lincoln Cents are zinc planchets plated in copper since 1982 and this process took a while to perfect. The plating didn't often completely adhere to the zinc planchet and so the air in these areas would expand and create bubbles of all shapes and sizes which look like freckles you are seeing. You can actually poke and burst these shapes and bubbles.

Once these pockets are breached it doesn't take long for the zinc oxide to form and eventually zinc rot to occur. Plating bubbles don't add any value to a coin, but collectors have paid a premium for them mistakenly because the coin was misrepresented as something else or the collector thought it was something it is not An extreme example of plating bubbling however might go for a few dollars on occasion, or such that it impacts the design in some way.
Edited by datadragon
12/06/2022 10:36 pm
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