Strange Metal 1981 20 Cent - Coin Community Forum

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Author	Replies: 9 / Views: 1,945
Bobcat New Member Australia 2 Posts	Posted 05/15/2018 9:39 pm I have an odd 1981 20 cent - shiny and only weighing in at 11g exactly. Photos show normal coin on left, strange one on right. It looks almost tinny and oily. Report this Post to the Staff

Bobcat New Member Australia 2 Posts	Posted 05/15/2018 9:42 pm Just realised I did the same picture twice here's the other side! Report this Post to the Staff
jbuck Moderator United States 196100 Posts	Posted 05/16/2018 3:21 pm to the Community! Coin Collector Since 1978 Avatar Old Avatar 7070 Eisenhower Australia Canada World CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
Nevol Formerly nancyc Australia 5385 Posts	Posted 05/16/2018 6:32 pm to CCF! PMD, some sort of environmental damage. life is a mystery to be lived not a problem to be solved Edited by Nevol 05/16/2018 6:36 pm Report this Post to the Staff
Mr T Pillar of the Community Australia 2180 Posts	Posted 05/19/2018 5:17 pm Some 1981 20c pieces were produced in Canada and tend to have a brighter, more reflective surface for whatever reason too. Report this Post to the Staff
Dorado Bedrock of the Community Canada 24885 Posts	Posted 05/22/2018 2:25 pm To the Forum. Report this Post to the Staff
chafemasterj Pillar of the Community United States 6514 Posts	Posted 05/22/2018 2:41 pm Welcome to the Forum! Check out my counterstamped Lincoln Cent collection: http://goccf.com/t/303507 Report this Post to the Staff
ryurazu Pillar of the Community Australia 1333 Posts	Posted 05/22/2018 8:24 pm Hmm I dont believe that is some error as all demcial coinage with new heads tend to have a high brilliance in unc condition, while the old head demicals have a more tone down luster similar to predemcial unc coins, a orangey grey colour luster. Report this Post to the Staff
gxseries Pillar of the Community Australia 3841 Posts	Posted 05/30/2018 08:14 am I swear there must have been some changes to the alloy or the planchets have gone through different chemical bath treatment. Early nickel copper coins struck before 1980s have a duller grey look whereas post 1990s have a much brighter polish look. I've seen some worn out post 2000s coins but they still have a different overall look compared to some XF+ coins that I find in circulation. My partial coin collection http://www.omnicoin.com/collection/gxseries My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm Regularly updated at least once a month. Report this Post to the Staff
Mr T Pillar of the Community Australia 2180 Posts	Posted 06/01/2018 9:36 pm Possibly - I think Australia stopped making planchets and started importing them in the 1980s at some point. Report this Post to the Staff
	Replies: 9 / Views: 1,945

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