1983 Lincoln Cent 2.7g? - Coin Community Forum

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Author	Replies: 8 / Views: 3,607
Larry L Chapman II New Member United States 8 Posts	Posted 07/07/2017 1:40 pm Hello folks I know the subject of Weight Tolerance on the 1982 & 1983 has been discussed in the past but I just came across this 1983 that weighs 2.7g consistently, I have weighed it 5 times now and it is consistently 2.7g and I'm not sure what to make of it. It's weighing in between the tolerance levels of the copper and the zinc. By the way I found this going through an antique fire extinguisher full of change most of which hasn't seen the light of day in 25-30 years! The parents of a close friend were kind enough to let me search through it and right now I'm on day one of searching through this possible treasure chest! Report this Post to the Staff

John1 Moderator United States 56855 Posts	Posted 07/07/2017 1:57 pm Mint tolerance is .13grams +/-. John1 Report this Post to the Staff
Larry L Chapman II New Member United States 8 Posts	Posted 07/07/2017 2:26 pm So 2.63g on the heavy end. Would this 83' just have a little thicker copper plating? Report this Post to the Staff
Pete2226 Pillar of the Community United States 3330 Posts	Posted 07/07/2017 2:40 pm Normal copper plating is 8 microns thick and weighs 0.0521g per plated cent at that thickness. Report this Post to the Staff
Larry L Chapman II New Member United States 8 Posts	Posted 07/07/2017 2:54 pm Ok so that would put it pretty close to this 2.7g, that helps explain it. Report this Post to the Staff
Pete2226 Pillar of the Community United States 3330 Posts	Posted 07/07/2017 3:10 pm The weight of a cent is 2.5 +/- 0.13 g. Doubled plating which would be = 16 microns would put it close. I don't know if doubled plating is possible. Report this Post to the Staff
Larry L Chapman II New Member United States 8 Posts	Posted 07/07/2017 3:17 pm Thank you guys for the great information! Report this Post to the Staff
cwb Pillar of the Community United States 3463 Posts	Posted 07/08/2017 08:11 am to the forum! It could be thick plating. Visit this page for more information about that: http://www.lincolncentsonline.com/C...%20Zinc.html Edited by cwb 07/08/2017 08:12 am Report this Post to the Staff
Pete2226 Pillar of the Community United States 3330 Posts	Posted 07/08/2017 09:28 am Claude - thanks for the link! One question: you show tolerance for zinc cent as +/- 0.10 g. Do you remember your source for that info? Edited by Pete2226 07/08/2017 09:29 am Report this Post to the Staff
	Replies: 8 / Views: 3,607

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