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Counterfeit Detection: Altered China 1981 5 Fen

 
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 Posted 08/10/2020  07:28 am Show Profile   Bookmark this topic Add CCFPress to your friends list Get a Link to this Message
NGC - This coin began its life with a different year. Then someone tried to make it look like a key date.

The 1981 5 Fen is a well-known rarity in modern Chinese numismatics. Examples of this date are worth hundreds of times the value of more-common dates. NGC graders recently saw this example, which at first glance seems to be a very high-grade 1981 5 Fen worth hundreds if not thousands of dollars.



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 Posted 08/10/2020  07:39 am  Show Profile   Bookmark this reply Add tdziemia to your friends list Get a Link to this Reply
Fascinating article on counterfeiting a modern coin. Not something I'm used to seeing. It also caught my attention wince I just plucked an UNC 1988 5 fen from my LCS 20 cent bin a week ago.
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 Posted 08/10/2020  1:09 pm  Show Profile   Check GrapeCollects's eBay Listings Bookmark this reply Add GrapeCollects to your friends list Get a Link to this Reply
very interesting
My best finds: 1999-WAM:http://goccf.com/t/332161 1988-RDV-6:http://goccf.com/t/335954#2873459 1986-Off-center: http://goccf.com/t/335952
1999 WAM #2:http://goccf.com/t/338710&whichpage=1
1981 Double Struck In Collar: http://goccf.com/t/350199&whichpage=1
ANA id: 3194067
My Type Set: https://www.NGCcoin.com/registry/co...sets/236574/
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 Posted 08/10/2020  8:00 pm  Show Profile   Bookmark this reply Add Sap to your friends list Get a Link to this Reply
You have to admit, it's very nicely done. The loss of lustre around the final "1" is the only clue (to my eyes) that it's an altered date.
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 Posted 08/11/2020  12:53 am  Show Profile   Check ryurazu's eBay Listings Bookmark this reply Add ryurazu to your friends list Get a Link to this Reply
it would be very hard to detect this on a 1981 5 fen without microscope.
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 Posted 08/11/2020  07:35 am  Show Profile   Bookmark this reply Add tdziemia to your friends list Get a Link to this Reply

Quote:
You have to admit, it's very nicely done. The loss of lustre around the final "1" is the only clue (to my eyes) that it's an altered date.


Agree. The reverse photo almost looks like the luster has been altered in some other areas, maybe to make it seem "normal." The obverse on the other hand seems to have uniform luster.


Quote:
it would be very hard to detect this on a 1981 5 fen without microscope.


If you read the full article, the distance between the first 1 in the date, and the stem of the wreath is a tell that can be seen with the unaided eye.
Edited by tdziemia
08/11/2020 07:39 am
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 Posted 08/14/2020  01:57 am  Show Profile   Bookmark this reply Add David Graham to your friends list Get a Link to this Reply
OK, can understand if nobody is keen to answer this, but am really curious as to how a forger "moves the metal around".
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 Posted 08/14/2020  02:18 am  Show Profile   Bookmark this reply Add mibarra to your friends list Get a Link to this Reply
I think it moves the metal at high temperature maybe the alloy used to make the number can be conformed at lower temperatures
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 Posted 08/14/2020  06:31 am  Show Profile   Bookmark this reply Add gxseries to your friends list Get a Link to this Reply
I had a couple of altered Soviet coins - pretty scarce years. Both sellers attempted to deny knowledge and wanted to force me to accept them.

In both cases, low grade coins are used and are semi cleaned to disguise the alterations. It looks like very fine engraving tools are used. Hard to tell from front up pic but at an angle the relief is slightly lower on the altered number.

Needless to say, I returned them. Not happy that I had to fork out for return shipping.
My partial coin collection http://www.omnicoin.com/collection/gxseries

My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm Regularly updated at least once a month.
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