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 Replies: 10 / Views: 1,177 |
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New Member
United Kingdom
6 Posts |
I have come across a 1983 20 pence coin, it seems to have been struck on either copper or bronze, there is also a fletch of "silver" on one face. its also thinner than a regular 20p coin. how do I verify whether this is indeed a genuine coin?
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New Member
 United Kingdom
6 Posts |
I will attempt to upload a photo or two when I learn how to do so.
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New Member
United Kingdom
6 Posts |
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Bedrock of the Community
United Kingdom
17953 Posts |
It is most likely to have been buried in the soil for a while: that usually turns cupro-nickel coins brown. If it weighs the same as a normal coin, then it will just have this environmental damage. I find dozens of brown 20p coins with my metal detector! The thinness could be due to corrosion in acidic soil or on a beach.  to the Forum! This is a great place to learn about coins! Edited by NumisRob
07/24/2020 04:54 am
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New Member
United Kingdom
6 Posts |
it weighs 4grams and is considerably thinner than a regular 20p  |
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New Member
United Kingdom
6 Posts |
I used kitchen scales, unfortunately I have nothing more precise. the regular 20pence reads 6g this coin reads 4g
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New Member
United Kingdom
6 Posts |
anyone have any ideas? especially on the process on finding out whether or not this is an actual error coin.
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Moderator
 United States
188770 Posts |
to the Community! |
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Bedrock of the Community
United Kingdom
17953 Posts |
I would guess it's been buried in acidic soil for several years. I've dug up 20-year-old 1p coins that were about half their original thickness. The rough surface also seems to indicate corrosion.
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Valued Member
United Kingdom
251 Posts |
That's corrosion, and definitely been buried in acidic soil for a considerable period of time. The bit of "silver" might simply be the original colour, maybe something covered that bit from being touched or the dirt around that area was scrubbed off.
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Valued Member
United Kingdom
82 Posts |
The 20p coin is exactly 5.0g so if you have a selection of new ones you can use them to test the calibration of your scales.
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Replies: 10 / Views: 1,177 |
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Posted 07/24/2020 04:47 am
