1980 Canadian Penny - Denticles Doubled On Rim?

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Author	Replies: 11 / Views: 2,971
Altaira Pillar of the Community Canada 2519 Posts	Posted 11/10/2017 2:59 pm Denticles appear to be doubled on the rim, and the rim is also doubled by a recessed "line". It's not a step-like doubling on the reverse, if the second picture suggests that, it's following the concave curvature of the field near the rim. What is happening here? The reverse somewhat looks like an incomplete clip, but the rim and edge diagnostics don't match. The obverse rim doubling appears step-like, and there's nothing visible on the edge. http://www.error-ref.com/incomplete-punch/ There is an old thread with doubled denticles from the same year, but minus the doubled rim. http://goccf.com/t/129075 Report this Post to the Staff

SPP-Ottawa Moderator Canada 10458 Posts	Posted 11/10/2017 3:20 pm Is the rim (edge) of the coin completely flat and smooth? "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US My eBay store Report this Post to the Staff
Altaira Pillar of the Community Canada 2519 Posts	Posted 11/10/2017 3:38 pm Upon closer inspection, I saw this above the D of DG. I don't know if it's related, or PMD. The rest of the edge appears smooth. Report this Post to the Staff
Andy888 Valued Member Canada 324 Posts	Posted 11/10/2017 4:16 pm Interesting! I'm always amazed when people like you find coins like this... how do you spot them?! Do you inspect every coin thoroughly? Report this Post to the Staff
Altaira Pillar of the Community Canada 2519 Posts	Posted 11/10/2017 4:34 pm Just quickly sorting through separating the nice stuff from less nice stuff, and the line through the denticles caught my eye. I can't be bothered to closely inspect things one by one. Good lighting always helps a lot. Report this Post to the Staff
Andy888 Valued Member Canada 324 Posts	Posted 11/10/2017 5:12 pm You're gifted with exceptional eyesight. Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 11/10/2017 5:38 pm No clue, but good eye! Report this Post to the Staff
pginrh Valued Member Canada 456 Posts	Posted 11/10/2017 6:13 pm Could be collar clash..... Report this Post to the Staff
Altaira Pillar of the Community Canada 2519 Posts	Posted 11/10/2017 6:53 pm I don't think so - a penny doesn't have a reeded edge. Also, they continue the denticles perfectly. Report this Post to the Staff
SPP-Ottawa Moderator Canada 10458 Posts	Posted 11/11/2017 02:06 am Definitely not a collar clash. I am thinking more like the planchet moved slightly at the beginning of the strike, "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US My eBay store Report this Post to the Staff
Altaira Pillar of the Community Canada 2519 Posts	Posted 11/11/2017 11:40 am Just some very weird machine doubling-esque thing going on, SPP? Report this Post to the Staff
SPP-Ottawa Moderator Canada 10458 Posts	Posted 11/11/2017 9:32 pm Yeah... maybe the pieces were getting a little loose on the press... I can't say exactly what happened, but logic and superposition tells me the main strike does 'crosscut' those outside denticles (i.e., occurred after)... "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US My eBay store Report this Post to the Staff
	Replies: 11 / Views: 2,971

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