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 Replies: 17 / Views: 3,769 |
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Pillar of the Community
Australia
1607 Posts |
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Pillar of the Community
United States
4897 Posts |
First thought was that it looks like a speckled bowling ball......
Second thought...looks like particle board...
No idea how that would happen?
Edited by amida17
05/13/2012 8:02 pm
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Formerly nancyc
Australia
5385 Posts |
I don't know what to think.  Are there any metallurgists handy   life is a mystery to be lived not a problem to be solved
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Valued Member
Australia
490 Posts |
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Valued Member
Australia
215 Posts |
I agree with the particle board look.
Certainly interesting looking coin
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Pillar of the Community
Australia
7096 Posts |
Not sure at all, the surface seems to be crystalline. Could be an impurity in the planchet or could simply be a part gold plating experiment. The explanation for the dent in the obverse (HAS HAD AN OBJECT FALL ONTO THE DIE, LEAVING A SMALL INDENT)is ludacris. Really don't know about this one it is totaly new to me. I have heaps of coppers with wood grain looks and different colours in the toning but nothing even close to the crystalline structure on the surface of this coin |
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Pillar of the Community
Australia
4411 Posts |
very strange...... very.... |
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Pillar of the Community
Australia
7096 Posts |
Been having a good think about this one. The only time I have seen this sort of surface on metal is after intense heat has been applied and quenched rapidly eg when hardening steel. This doesn't seem to be the case with this coin or you would see the colouration from the quench. I am certain there is a simple explanation for this but it is way beyond my expertise. I will be watching this threat closely to get the answer that will inevitably come from one of our esteemed members with far superior knowledge than I possess   |
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Bedrock of the Community
Australia
21788 Posts |
PMD, flicked with a corrosive agent?
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Pillar of the Community
 Australia
1607 Posts |
I reckon your right Sel as the surface is very uneven if you blow the pictures up,notice the seller does'nt have that function on the listing.
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Pillar of the Community
Australia
507 Posts |
I think the 3rd photo shows the "flecking" best and had been wondering whether this was a result of the metal/planchet production phase. As to their comment "HAS HAD AN OBJECT FALL ONTO THE DIE", I think the word DIE should be replaced by COIN aka PMD. If an object falls onto a die, the result would be a raised surface on the coin, not the other way round. |
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Pillar of the Community
Australia
7096 Posts |
Quote:
PMD, flicked with a corrosive agent? Can you explain this statement sel because I have never seen this on a coin before and would love to add your expert expertise to my arsenal of what not to buy |
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Formerly nancyc
Australia
5385 Posts |
If this had been flicked with a corrosive agent, the blemishes on the surface would, in my opinion, be more round than angular, unless the corrosive agent was dry and crystalline, plus I would expect a corrosive agent to have eaten into the surface leaving it pitted and corroded. The surface angles that are easily seen just don't make sense, unless the seller really has had 'expert' opinions, and it is due to an improper metal mix in the planchet manufacture, but if that's the case, there would be many many more of them looking the same, so why has it taken 47 years to surface? More info is needed about how and where planchets were made back then, and how many were stamped or cut from any individual sheet of metal. Some sort of environmental PMD is my guess. life is a mystery to be lived not a problem to be solved
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Pillar of the Community
1119 Posts |
gal plating failure most likely
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Pillar of the Community
Canada
2781 Posts |
i am hoping for a legitimate coin BUT,
guessing powder coated, but instead of using powder it is using a flake
there are a lot of new, low temperature systems out there now, some as low as 200 degrees. you could cook this up in your oven at home.
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Bedrock of the Community
Australia
21788 Posts |
erkle: MY gal will never have a plating failure. She was never plated in the first place!  |
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Replies: 17 / Views: 3,769 |
Posted 05/13/2012 8:12 pm
