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 Replies: 31 / Views: 29,635 |
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Formerly nancyc
Australia
5385 Posts |
Coin rolling machines often damage the 2 end coins in a roll, but it's usually easily identifiable for what it is. There's a circular 'scrape' around the edges of the surface, but I rarely see one coin that has is on both sides, in fact I can't recall that I've ever seen one damaged on both sides. I can't say what happened to the pictured coin, but I do feel that it's most likely PMD. povman, Any chance of a couple real good sharp close ups of a section of the area in question on each side? It might help one of our more 'expert' members to explain what caused the rings. life is a mystery to be lived not a problem to be solved
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Valued Member
Australia
278 Posts |
Nancyc,
I have a couple of coins with damage to both sides of the coin, they get put into rolls that often that some are bound to get put on either end of a roll one time or another or in my case both.
But looking forward to seeing how this pans out.
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Pillar of the Community
Australia
1005 Posts |
Its not Rolling Machine Damage, because from what I have seen, that tends to start from the highest points of the coin, and scrape into the surface of the coin. The picture does not appear to show any damage to the high points (particularly the kangaroo's ear). Incidentally I found a really, really nice 1971 5 cent today - except for the big rolling machine scrapes :( |
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Valued Member
Australia
65 Posts |
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Formerly nancyc
Australia
5385 Posts |
Anyone with an old one of these, please humour  me by getting a very soft pencil eraser (DATS PLASTIC or Staedtler RASOPLAST or similar) and seeing if the mark/stain will rub off, and let us know the result. It's got me a bit intrigued to find out just what it is.  Now I've got to try and find one so I can experiment on it myself. I've probably had heaps of them and just tossed them back assuming they were rolling machine damaged.  life is a mystery to be lived not a problem to be solved
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Pillar of the Community
Australia
1005 Posts |
I am still thinking "mechanical pencil"
If the tip of the pencil (which the "lead" comes out of) was run around the inside of the rim of the coin, then there would be a gap between the rim and the mark (as we see).
I tried to find a pencil to try this with last night, but could only find one where the metal tip was wide and could retract, so I did not think it would work at positioning the mark away from the edge of the rim.
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Valued Member
Australia
65 Posts |
I wasn't going to admit to this but seeing as you asked NancyC, I did attack another one with an eraser thinking it was pencil and it didn't remove it. With the other one I found (the one I rubbed with an eraser then put back into the bank bag)the line was closer to the rim and seemed thicker.
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Valued Member
119 Posts |
I have seen this on unc coins too.
My current hypothesis is that this happened in the upsetting machine as the rims were being put on the planchets.
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Valued Member
Australia
85 Posts |
1984 and 1985 kangaroo $1 well circulated,most show this outline,move along nothing to see here....
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Pillar of the Community
Australia
1005 Posts |
Edit. Sorry all. Just realised I should have started a new topic for the question I raised. I will start a new topic.
Edited by ozcoins
10/20/2011 02:45 am
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New Member
 Australia
4 Posts |
Sorry I haven't posted for a while, been O/S, just wanted to thank everyone for their input and to let you know, I tried the eraser trick and the line is still there... Seems that they aren't anything special though..
Thanks again people, much appreciated.
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New Member
Australia
9 Posts |
I also found one. I'm keeping it. Too many the same. Must have been a minting error.
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Pillar of the Community
 Canada
1762 Posts |
@povman  to the community. Nothing else to add. |
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Valued Member
Australia
383 Posts |
I have just noodled through a bag of $1 coins. Found a few 85s with the rings. Tried scratching it off with a thumb nail but did not remove much. Could not detect any difference in the surface where the ring was. Tried soaking in acetone but no change. Tried a soaking in coca-cola and a scrub with a toothbrush afterwards but some of the ring still remained. Don't know what it is. Did not find any similar rings on any other coins in the bag of 500 coins. Would be curious to know why only the 1985 coins and what it is?
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Valued Member
New Zealand
140 Posts |
Bottom coin from a bus coin dispenser.
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Posted 10/17/2011 10:02 pm
