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 Replies: 19 / Views: 3,074 |
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Valued Member
Australia
119 Posts |
Hi all Found this odd coin amongst the uk pennies Seems really strange Weight 9:34 grams I have taken picks to provide evidence of color diff. Interested to hear opinions Found nothing on web Thx     |
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Bedrock of the Community
 United States
12477 Posts |
The weight is normal for a circulated example. Beyond that, I don't know.
In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
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Bedrock of the Community
United Kingdom
17925 Posts |
Old pennies got treated pretty harshly by some people - the combination of a large size and low face value made them ideal for 'experiments' by schoolkids. Maybe it's been plated with mercury - a thin coating probably wouldn't have a noticeable effect on the weight.
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Valued Member
 Australia
119 Posts |
Yes Got me intrigued Have included another pic for further color reference Thx for your comment  |
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Moderator
 United States
34402 Posts |
@pshann, I agree with @nr about a coating such as mercury have been applied to this in the past.
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
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Valued Member
Australia
119 Posts |
How would I get that verified?
Btw - thx for the comment
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Moderator
United States
34402 Posts |
You could bring it to a local university and have an engineering prof run one of a variety of non-destructive tests to look for evidence of nickel or chromium (if it was plated at one point) or mercury. For example, most scanning electron microscopes have an Energy-dispersive X-ray spectroscopy attachment. X-ray fluorescence might also give you the answer.
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
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Valued Member
Australia
119 Posts |
Thx
Spence
Appreciate the direction
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Bedrock of the Community
Australia
21786 Posts |
I have a few nickel plated World coins of this vintage.
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Pillar of the Community
Canada
5239 Posts |
Billions of coins circulated for 100 years among millions of people. If it is conceivable and physically possible, it has happened.
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Bedrock of the Community
United States
94367 Posts |
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Moderator
Australia
16826 Posts |
I would assume that it had been plated. A penny is about the same size as a florin, or maybe a halfcrown (it's actually between the two). The two coins have the same obverse. So, silver-plate a coin, pass it over heads-up, and hope the merchant takes it for a florin. It's illegal to do this, of course - plating a coin to make it resemble a higher denomination is specifically prohibited by the Coinage Acts (or equivalent legislation) of most countries, including Britain. Depending on the laws where you are, it might even be technically illegal to own such a coin.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Bedrock of the Community
United States
12477 Posts |
If it is nickel-plated, it may be attracted to a strong magnet. You might as well try that test.
In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
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Bedrock of the Community
Australia
21786 Posts |
If a copper alloy coin has the misfortune to be nickel plated,
it nevertheless will not be attracted to a magnet,
simply because there is not enough nickel in the plating to have sufficient magnetic influence.
The weight of the copper core is enough to overcome the magnetic attraction.
Pure nickel coins are very obviously magnetic.
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Valued Member
Australia
119 Posts |
Hi all
Thankyou for all your comments
Asto magnetic - zero
Absolutely nothing
That rules out nickel
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Pillar of the Community
United States
789 Posts |
Have you checked the edge?
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Replies: 19 / Views: 3,074 |
Posted 06/12/2019 02:40 am
