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How Did This Happen To These 1981 Proof Coins?

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Valued Member
Japan
84 Posts
 Posted 06/07/2020  03:29 am Show Profile   Bookmark this topic Add Stephen-P to your friends list Get a Link to this Message
Hey guys. I picked up this set of brown proofs recently and wanted to know how it happened. The seal has never been broken, but could this be the cause of direct sunlight while still in the plastic?
I tried searching for that specifically but with no results. The surfaces are grainy with parallel lines darting across the entirety.
Looks really neat, even if they are rotten.
Thanks for your help!







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 Posted 06/07/2020  03:49 am  Show Profile   Check GrapeCollects's eBay Listings Bookmark this reply Add GrapeCollects to your friends list Get a Link to this Reply
Not sure, but I kinda like them
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 Posted 06/07/2020  03:55 am  Show Profile   Check Yokozuna's eBay Listings Bookmark this reply Add Yokozuna to your friends list Get a Link to this Reply
Could be from heat/sunlight exposure. The plastic may have outgassed and caused the coins to tone. The red plastic insert even looks faded and warped.

Any one else?
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 Posted 06/07/2020  04:13 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Some kind of poor storage condition,maybe even water damage?
John1
( I'm no pro, it's just my humble opinion )
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1996 Posts
 Posted 06/07/2020  09:03 am  Show Profile   Bookmark this reply Add hfjacinto to your friends list Get a Link to this Reply
Improper storage. Like on a sunny window, in the attic, garage or damp basement. This is user error, someone didn't properly store this hence you get a somewhat cool looking toning.
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 Posted 06/07/2020  09:16 am  Show Profile   Bookmark this reply Add fortcollins to your friends list Get a Link to this Reply
To me, it looks like the proof set was submerged in water, and then placed in sunlight for an extended period to dry out. That would explain the contaminants in contact with the coins and the faded and warped appearance of the insert.
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 Posted 06/07/2020  09:20 am  Show Profile   Bookmark this reply Add Badger Mint to your friends list Get a Link to this Reply
Proof sets are not air tight, so improper storage conditions can allow for toning
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 Posted 06/07/2020  09:20 am  Show Profile   Bookmark this reply Add kanga to your friends list Get a Link to this Reply

Quote:
Some kind of poor storage condition,maybe even water damage?

My thinking exactly.

A possibility that should to be taken into consideration: water damage from flooding.
Hurricane zips through and floods everything.
Or tornadoes. Or ...!
Those holders aren't completely sealed; moisture can get in.
Describe it as if there were no picture.
Picture it as if there were no description.
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 Posted 06/07/2020  09:25 am  Show Profile   Bookmark this reply Add ijn1944 to your friends list Get a Link to this Reply
Agree with the observations above. I like the set--would pick one up at a show or coin shop if I came across it. Cool.
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 Posted 06/07/2020  09:29 am  Show Profile   Bookmark this reply Add Blind Squirrel to your friends list Get a Link to this Reply
Almost looks like this petri dish full of bacteria.
Valued Member
Japan
84 Posts
 Posted 06/07/2020  09:44 am  Show Profile   Bookmark this reply Add Stephen-P to your friends list Get a Link to this Reply
Thanks for the input everyone! I was thinking about cracking it open to examine them more closely but after seeing Blind Squirrel's bacteria picture I think they'll stay where they are :p
Valued Member
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84 Posts
 Posted 06/07/2020  09:47 am  Show Profile   Bookmark this reply Add Stephen-P to your friends list Get a Link to this Reply
On second thought, I think I'll crack 'em eventually anyway... It'll be fun to figure out how this mini laboratory was created. I couldn't find any other coins online that resembled these so it may be useful.
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 Posted 06/07/2020  1:13 pm  Show Profile   Bookmark this reply Add USSID18 to your friends list Get a Link to this Reply
with all the above comments. I would just leave it the way it is. I like the look! !
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 Posted 06/07/2020  2:36 pm  Show Profile   Bookmark this reply Add nfine to your friends list Get a Link to this Reply
That was a nice type II (clear S) proof set at one time.
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 Posted 06/07/2020  3:33 pm  Show Profile   Bookmark this reply Add suipakpaikungfu to your friends list Get a Link to this Reply
Yep, not airtight and then environmental damage.
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Japan
84 Posts
 Posted 06/08/2020  07:10 am  Show Profile   Bookmark this reply Add Stephen-P to your friends list Get a Link to this Reply
I'm kind of curious about something. I can't shake the feeling that some kind of foreign chemical was to blame for this, as opposed to just heat and water. Of course, I was thinking the same thing but realized the outside plastic and black casing is still jet black with shiny lettering. Outside casings are in great shape. It's only the coins and red plastic that seems disrupted.
Edited by Stephen-P
06/08/2020 07:12 am
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