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 Replies: 13 / Views: 2,067 |
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Pillar of the Community
Australia
750 Posts |
Found this one on Sunday in change. The text can just be made out and the monarch is quite visible. The obverse has seen a reasonably recent touch with a coin counter/roller  on part of the text whereas the coin has obviously been like this for some time (hopefully since the time of minting!)     |
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Pillar of the Community
Australia
1607 Posts |
Maybe a strike pressure test coin,or it could have been struck through grease/oil,but i'd suggest the first option would be more likely.
Edited by appleangel07
01/29/2013 06:30 am
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Pillar of the Community
Australia
4411 Posts |
If it was a strike pressure trial strike the weakness would be on both sides. I think a strike though grease is more plausible. The other thing which I think it the most likely is that is has been in some sort of acid.
Edited by enworb
01/29/2013 06:50 am
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Pillar of the Community
 Australia
750 Posts |
The edges look standard $1 to me and are very consistent with a normal $1 and consistent all the way around the coin.
I'll take some pics in the daylight tomorrow which might add some more insight for you.
Weight appears standard 9g (but I only have kitchen scales). Will make a balance tomorrow and try it against some other 84's.
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Pillar of the Community
Australia
750 Posts |
Here's some more pics taken in daylight, though we probably won't need them.    I made a balance scale (pretty crude, a ruler centred on a skateboard wheel and taped). But, regardless of sides used it favoured other $1 coins to this one, so this must be just a small fraction lighter. I didn't have any on hand that seemed as worn as this one, but still I think it's reasonably conclusive that something has caused the effect on the obverse. Bugga! Perhaps it was acid as Enworb suggests, or maybe sandblasted? Who knows. I would have thought that either of those would have left some trace on the rim, but nothing that I can see. Thoughts still appreciated!  |
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Pillar of the Community
Australia
1295 Posts |
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Pillar of the Community
Australia
750 Posts |
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Pillar of the Community
Australia
2830 Posts |
"struck through" is what Seppos say whenever they see PMD, but can't explain it. One day, I'm tempted to ask the Mint to fill a few dies with grease, put in some standard planchets, and let it rip, so we can all see what the outcome really is. Personally, I think a grease-filled die would have zero grease remaining once the dies closed. The interesting thing about this coin is that the damage is unilateral, but the rim seems nearly OK. There have been threads on CCF, from America, as I recall, showing coins found in tumble-dryers. As the coin slides around, it tends to stay one-side down, and the other side gets no abrasion. |
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Pillar of the Community
Australia
750 Posts |
Thanks Peter, yes, something definative from the RAM would be great. Perhaps someone has something in their archives.
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Valued Member
Australia
251 Posts |
I thought dryers shrunk coins javascript:insertsmilie('  ') |
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Valued Member
Australia
251 Posts |
Well that's what I was told javascript:insertsmilie('  ') |
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Pillar of the Community
Australia
1295 Posts |
Quote:
The interesting thing about this coin is that the damage is unilateral, but the rim seems nearly OK. I've seen several pennies damaged the same way. The two methods I can think of is that it was sat obverse down in a very shallow dish of acid. The other is that an eye dropper was used to apply acid to the obverse. Surface tension of the fluid and the rims are enough to keep a pool of the liquid on the top of the coin. |
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Valued Member
Australia
251 Posts |
the eye dropper thing sound alright  but also there is the caped die thing aswell....? or dose that give the coin a smother look with out the little specks? |
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Pillar of the Community
Australia
7096 Posts |
I don't suspect acid damage on this coin and suspect wear is the culprit. All $1 coins have a raised rim on the obverse to protect the design, on this coin that raised rim is Non existent and has been worn off allowing the design to be eroded. It is however PMD and IMHO never came from the mint in this condition. There was a florin glued to the bar at the Whim Creek Pub years ago that looked just like this coin. Everyone tried to scrape it up with their change and the reverse side was almost worn flat and barely recognisable as a 2 bob bit. They also had a Camel that would poke his head through the outside servery and steal your stubby if you weren't careful, a drunken Camel isn't a pretty sight  When the rebuilt that pub they removed the (now quite famous locally) coin and the obverse was almost perfect. It is an unusually worn coin but WORN it is and not an error. |
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Replies: 13 / Views: 2,067 |
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Posted 01/29/2013 05:52 am
