Sintered/Annealed 50ct Coin? Showing Copper Surface? - Page 2

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Author	Replies: 22 / Views: 4,673	Page: of 2

trout1105 Pillar of the Community Australia 7096 Posts	Posted 04/21/2013 07:06 am Quote: sorry trout It is no pub coin not by a long shot. The coin is not corroded either. The thread all wrong! Not a pub coin or road kill or found in a park You asked a question about a coin and I gave you my considered opinion along with other more esteemed and more experienced members and the consensus is that this IS a PMD coin. Why do you persist with the idea that this is a planchet annealing flaw when it clearly isn't IF I had the time and the inclination I could easily make a similar coin for you in my shed Simply put this coin in a 2x2 and save it so that in a few years you can look at it and think "What a dill I was thinking that". Stick around in this forum and you will learn some invaluable knowledge about coins and errors if you totally disagree with the opinions posted you can always send it to a TPG and get the coin verified. IF the coin comes back with a description of "annealed planchet flaw" then I WILL apologise without reservation Until then I am right and YOU are wrong Report this Post to the Staff
enworb Pillar of the Community Australia 4411 Posts	Posted 04/21/2013 08:12 am Report this Post to the Staff
oh my florin Pillar of the Community Australia 1006 Posts	Posted 04/21/2013 08:35 am Hi this coin is not an annealing error as said by trout and other members. This is because of a few key factors. Annealing is the process of melting two metals together by heating them up to a critical point to create an alloy in this example cupronickel which is produced in massive sheets and for an annealing error to occur the annealing furnace would have to be significantly higher than normal to cause the metals to reach a critical point (the point at which the metals will seperate) but your coin looks like pure copper on the outside so if what you are saying is true then we should be able to see the nickel on the outside of the coin if only a small amount but there is none visible. Anyway no annealing error has ever been sighted that is so severe it turns the whole coin a different colour it is always only parts of it. Report this Post to the Staff
moneybags New Member Australia 27 Posts	Posted 04/21/2013 5:24 pm Good Morning, thanks to you all who answered my post. I just got a little frustrated with no real detailed answer. I wont clean up the coin until I can show it to a Dealer one day hand to eye, to get a clear point of view on it. Mr trout man, We would love to see your coin if you could make it if it is possible. Cheers in kind to all. Report this Post to the Staff
ozcoins Pillar of the Community Australia 1005 Posts	Posted 04/21/2013 6:36 pm I agree with the others that this is PMD. One thing I observed is that the discolouration on the bottom right of the coin changes where the rim is. Ie discolored field and not discoloured on rim. If it was the blank, then I would not expect on change on the rim. That part of the coin also looks to me like it has had liquid on it which caused the colour and the liquid evaporated leaving the colour. Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21788 Posts	Posted 04/21/2013 9:06 pm The 50c looks like PMD to me, although it may have been caused naturally. Over the years, I have seen a few copper nickel coins, of all countries, that quite obviously look to be copper, but in fact, are not. An aggressive environment can cause this over a period of years, which would also require to coin to be out of circulation to allow the coin to change appearance, especially if the change was happening in natural circumstances. Differential 'toning' such as this could occur if the coins were heaped, not stacked. I also see the possibility of a 'pub coin', to fool unknowing intended buyers, but it could equally also be just the result of 'shed job' with some innocent fooling around. I do that with modern circulating coins (rarely) just to entertain myself. They all go back into circulation , because I can't see any point in keeping them. Report this Post to the Staff
enworb Pillar of the Community Australia 4411 Posts	Posted 04/21/2013 9:11 pm There are actually examples of Australian coins with annealing errors that have caused the entire coin to appear copper. I have sighted a PCGS verified 20c which appeared to be completely copper. This coin has all the signs of a damaged coin. Take it to a dealer and they will say exactly the same thing. If that gives you peace of mind then by all means go for it. Report this Post to the Staff
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