Plating Issue? Planchet Issue? Die Cap Coin?

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Author	Replies: 12 / Views: 1,469
Potbellypub Pillar of the Community United States 900 Posts	Posted 02/02/2017 7:02 pm Found this in a penny roll . No scratches , looks lightly struck and appears to have two layers of zinc sandwiching a layer of copper . I don't have any idea what I have here . Thought maybe die cap coin but I really don't see any obverse characters on reverse of coin . Any ideas on this one ? Edited by Potbellypub 02/02/2017 10:46 pm Report this Post to the Staff

CoinCollector2000 Pillar of the Community United States 2563 Posts	Posted 02/02/2017 7:12 pm PMD, looks like a grinder and/or parking lot coin Report this Post to the Staff
ErrorCoins222 Pillar of the Community United States 1699 Posts	Posted 02/02/2017 7:16 pm Agreed. Some form of artificial wear has exposed the zinc core on the highest portions of the design and rim. The conclusion is supported by the absence of any design rim and the exposure of zinc only on the high parts of the design. Report this Post to the Staff
Spence Moderator United States 34447 Posts	Posted 02/02/2017 7:24 pm fine grit sandpaper maybe "If you climb a good tree, you get a push." -----Ghanaian proverb "The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz Report this Post to the Staff
oldmike Pillar of the Community Canada 891 Posts	Posted 02/02/2017 7:37 pm Parking lot or? Report this Post to the Staff
Druu Pillar of the Community United States 1000 Posts	Posted 02/02/2017 7:58 pm Rim's gone, so sanded. I would disagree with parking lot because the uneven asphalt leaves notable pitting on the surface. Belt grinder is my guess. Abrasion seems too even to have been done by hand. Report this Post to the Staff
aristarchus123 Pillar of the Community United States 1696 Posts	Posted 02/02/2017 8:39 pm Nice photos! Report this Post to the Staff
Potbellypub Pillar of the Community United States 900 Posts	Posted 02/02/2017 9:19 pm Firstly thanks for the replies and I'm no expert but I agree and disagree with the analogy of this damage . I did my own experiment with a 1991 penny just like this and 2000 grit sandpaper on a smooth surface and sanded the new coin to the same depth as the first one as you can see in the pics and even with 2000 grit the scratches are present I sanded the back farther than the original and both side still did not sand as far at the rim as you can see also I have a pic of the chin area on the new coin at 40x magnification and the original coin at 100x mag still no scratches on the original and the new coin has scratches around the fields sanded and the original coin has the zinc kind of piled up and splotchy . Still a mystery to me as the method of this coins damage .and again I'm not saying anyone is wrong I would like to know the method . and as an idea of the magnification the last pic has a white spec in it , its a very tiny grain of salt. I guess the main thing I learned from this is I have too much time to wonder about things and way too much access to high magnification ! Edited by Potbellypub 02/02/2017 10:42 pm Report this Post to the Staff
Druu Pillar of the Community United States 1000 Posts	Posted 02/02/2017 10:19 pm I'm sticking with belt sander. There's a bit of give in the belt, and it looks like the coin was held from one edge and rotated, note more missing material in upper right? If you sanded by holding the coin and sandpaper, it would wear unevenly. It looks like you set the sandpaper down on a table and rubbed the coin against that. In that case, the highest raised surfaces would wear first. My final guess: belt sander, but the person who did it did so with the goal of removing the rim entirely. Coin was not held at a flat 180 degrees to the belt, but at an angle. If I had access to a belt sander at the moment, I'm sure I can replicate it. Report this Post to the Staff
Potbellypub Pillar of the Community United States 900 Posts	Posted 02/03/2017 07:43 am My best uneducated guess would have to go towards a dryer or washing machine coin that was discovered early too perfect to be done by human hands using an abrasive it has the same amount of wear on both sides in the same spots and no scratches but that's just a theory . I know this is not an error coin and probably very unimportant to most CCF members and I apologize if I have used the forum in an inappropriate manner thanks for all the replies this was a fun one for me to figure out ! Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 02/03/2017 11:22 am PSD. Note the highest points are the coin affected. It wasn't done too harshly as some of the copper remains. But the highest points on the forehead is altered by moving the zinc around. It is not a Dryer Coin was the tumbling affect would have rolled over the rims/edge of the coin. This has not happened. Just PSD probably with a sander or moving it over a cement floor only affecting the highest points. Report this Post to the Staff
Druu Pillar of the Community United States 1000 Posts	Posted 02/03/2017 3:10 pm Dryer Coins exhibit an even pitting on the faces of the coin and a thickened rim, which is the opposite of what you have here. Like you said, not an error, but still a fun thread. Coin forensics. Report this Post to the Staff
Potbellypub Pillar of the Community United States 900 Posts	Posted 02/03/2017 5:36 pm I've learned several new thing with this thread and have enjoyed the debate and as druu put it coin forensics ! Thanks for all the replies and info it's been fun ! Report this Post to the Staff
	Replies: 12 / Views: 1,469

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