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 Replies: 11 / Views: 946 |
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Valued Member
Canada
230 Posts |
Here is a 10 cents significantly thicker than the regular one with a weight of 2.53 g. Normal coin is 1.75 g. From some reference sites, my best guest is a strike on a Ghana 5 pesewas planchet. The Mint was producing that coin at that time. So the composition of this coin should be 91% iron, 8% Ni, and 1.2% Carbon. Since the regular canadian is based on Copper-plated steel (92% steel, 5.5% copper, 2.5 % nickel), can we considere this coin as an off-metal strike? One of the picture compares the thickness of the coin with a regular one. We can see that the collar was to small with the faulty reeded edge. If you have other option, let us know....    Edited by SP67
08/26/2024 10:18 pm
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Pillar of the Community
Canada
1529 Posts |
Hard to tell from the photos, but is it more nickel-coloured like a Canadian nickel or more coppery like a penny?
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Moderator
 United States
56855 Posts |
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Valued Member
 Canada
230 Posts |
The coin is MS with a nickel coloured.
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Pillar of the Community
Canada
1529 Posts |
Then I think you're right about the Ghana planchet.
There were two other foreign coins minted that year with the same weight (Bahamas 1c and Barbados 1c), but both of those are copper-plated.
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Moderator
United States
162716 Posts |
Very interesting.  |
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Bedrock of the Community
United States
94367 Posts |
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Pillar of the Community
United States
5732 Posts |
Maybe it was struck on a thick planchets? Does it stick on magnet if its the same steel composition?
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Valued Member
Canada
230 Posts |
Yes the coin strick to a magnet.
And yes the planchet was thicker than usual, but the simplest root cause is the planchet from Ghana, not a rolled thick error.
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Moderator
Australia
16287 Posts |
Quote:
Since the regular canadian is based on Copper-plated steel (92% steel, 5.5% copper, 2.5 % nickel), can we considere this coin as an off-metal strike? No. "Off-metal strike" refers to when a planchet is specifically made of the correct size, but the wrong metal: somebody makes a correct-sized blank out of gold to strike a coin usually made of silver, that sort of thing. You could use it if a strip of alloy intended for Ghana coins was accidentally fed into the rollers to make Canadian blanks, but it's not the correct term for what is simply a "wrong planchet". You could use XRF or some similar technique to test the "Ghana blank" hypothesis: test a normal Canadian 10 cents, a normal Ghana 5 pesewas, and your coin, and see which elemental profile your coin matches. If it matches neither, then you'd need to search for an alternative explanation. Also note: "steel" isn't an element, so won't be reported on XRF. "Steel" in this case is an alloy of iron and other secret-sauce ingredients the Mint has decided to use, the precise composition of which is some kind of official secret.
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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Valued Member
Canada
230 Posts |
Thanks for your answer SAP. I think you point out just one of the off-metal type. My main reference is this link for more details on the definition. https://www.error-ref.com/?s=off+metalYou will note from error-ref that there's two main types of off-metal: (1) off-metal error & (2) wrong stock: off-metal. I think your definition if related to the version 2. And my coin corresponds to the version 1. But I'm not specialist with off-metal error, so I might be wrong. Edited by SP67
08/28/2024 08:44 am
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Valued Member
United States
457 Posts |
I have several of these 2007's struck on thicker Ghana 5 Pesewas planchets. I also have 2007's struck on Oman 25 Baisa planchets. Look same as normal dimes but much thicker and heavier. Strikes are very full due to planchets being thicker.
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Replies: 11 / Views: 946 |
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Posted 08/27/2024 04:45 am
