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1983 Double Clipped (20%) Bronze Transition Lincoln Cent

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 Posted 05/12/2021  11:48 pm  Show Profile   Bookmark this reply Add Numiscrat to your friends list Get a Link to this Reply
I am not sure if those are clips or not, but the metal core looks more like zinc than copper to me. I am firmly in the "zinc" camp unless the 2.5 gram weight is wildly inaccurate.

The color on the cut edge might be tarnish, a foreign substandard, or a pale shiny surface reflecting the colored light bouncing from a nearby colored surface. It looks paler than the copper surface, to me. It also has the grainy appearance of a broken off piece of zinc.

As far as weight... Allowing for tolerances in the weight of a zinc LMC (plus or minus 0.13 grams) plus the uncertainty of the measurement of a scale that only measures to the nearest 0.1 gram (something + or - on the order of the last decimal place is a good place to start in the absence of calibration data or specs) a measured value of 2.5 grams for a clipped zinc LMC seems to be within the range of what we could expect. That uncertainty would account for the 0.1 - 0.2 grams (by my experiment above) or so of material that is obviously missing. So, that can explain the OP's measured weight of a 2.5 gram for a clipped zinc cent without invoking a paint hypothesis or anything else, but it won't reach far enough to cover the bronze planchet hypothesis.

This amount of effort expended on this subject is probably overkill, but I'd rather do math, read about coins, and perform experiments than work on my taxes, so the rest of you are just going to suffer my ramblings.... Please forgive me.

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 Posted 05/13/2021  12:19 am  Show Profile   Bookmark this reply Add merclover to your friends list Get a Link to this Reply
I'm in the PMD camp on this one.
ša va bien aller

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 Posted 05/13/2021  12:48 am  Show Profile   Bookmark this reply Add Greasy Fingers to your friends list Get a Link to this Reply
with Bruce
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 Posted 05/13/2021  12:12 pm  Show Profile   Bookmark this reply Add That Coin Dude to your friends list Get a Link to this Reply
Another thing to point out is the strike of the coin, it would be weakrer around the clips, as well as the clips bulging in the middle.
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 Posted 05/13/2021  6:06 pm  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
These two clips are genuine. The clip on the right shows fadeout and taper of the design rim as it approaches the clip. As for the clip on the left, the I of LIBERTY and the U of UNITED show metal flow next to the clipped edge. The two clipped edges do not show the classic cut-and-tear texture of a curved (concave) clip, but this feature is variably expressed. The edge should appear copper-colored whether it's a zinc cent or a copper-alloy cent. Color, luster, and the possible presence of microscopic bumps on the obverse suggests this is a copper-plated zinc cent. The zinc stock may have been thicker than normal, with the missing mass coincidentally returning it to specification weight.
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 Posted 05/13/2021  6:10 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Thanks Mike. Boi due I pheele dum.
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 Posted 05/13/2021  6:14 pm  Show Profile   Bookmark this reply Add Rothery to your friends list Get a Link to this Reply

Quote:
Boi due I pheele dum

Move over Coop, ya got company -
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 Posted 05/15/2021  04:36 am  Show Profile   Bookmark this reply Add Flokizomb to your friends list Get a Link to this Reply
thank you for all the advice and help.i will be sending to NGC after this weekend so ill upload photos of the coin once its been slabbed. again thank you all.
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