1959 D Lincoln Memorial Cent Mint Error - Alloy Issue

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Author	Replies: 7 / Views: 1,644
tropicalbats Pillar of the Community United States 6116 Posts	Posted 08/20/2022 11:47 pm Gonna need a little help from the folks who know about the metal issues for Lincoln cents to understand this one. Streak extends onto rim to the east so it is full planchet, and seems to be a brassy color where the silver colored metal has worn off or for whatever reason is missing. All comments appreciated. 1959-D Lincoln Memorial cent mint error - alloy issue Report this Post to the Staff

datadragon Pillar of the Community United States 1648 Posts	Posted 08/21/2022 12:16 am An unmixed globule of tin or zinc can be responsible for the gray band that crosses the obverse face such as in the photo a 1948 cent in the link below. This is an intrinsic metallic inclusion. Other types of improper alloy mix errors look different. In the case of a copper-alloy cent with too much tin or zinc, this will result in a brassy color. Alternatively, the constituent metals can be in the right proportions but poorly mixed. This will leave the coin with light and dark bands. Of course, the two mistakes can occur together. A woodie is an improper alloy mix for example and more commonly is the one talked about with improper alloy mixes. https://www.error-ref.com/improper-alloy-mix/ If its not that it could be something after minting on the surface that just happens to have a similar appearance. Edited by datadragon 08/21/2022 12:18 am Report this Post to the Staff
CoinHI Pillar of the Community United States 2736 Posts	Posted 08/21/2022 01:28 am Neat, Sure looks like the 'intrinsic metallic inclusion" error but I'm anxious to see what others say. Looks like some minor clash marks on obverse too. "Pride is yoked with callous behavior, as humility is with compassion." St. Gregory Palamas Top Finds - 1969-S 1c FS-101 http://goccf.com/t/477681 1976 D WQ FS-101 http://goccf.com/t/382777 - 1968 D 1c FS-801 http://goccf.com/t/422254 Cool clashed dies - 1972 D 1c http://goccf.com/t/429855&SearchTerms=CCL Struck-In Rim Burr - 1969 S 1c http://goccf.com/t/425587&SearchTerms=burr Floating (Type II) Counterclash - 1978 D 1c http://goccf.com/t/434991&SearchTerms=1978 Report this Post to the Staff
stoneman227 Pillar of the Community United States 2376 Posts	Posted 08/21/2022 05:19 am This looks to be what is left of a intrinsic metallic inclusion that laminated away pre-strike. A slight void in a planchet will strike out just fine and this example shows the aftermath of struck out lamination striations. Very cool TB ! Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 08/21/2022 08:37 am Pretty nifty! Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 08/21/2022 11:10 am Or thin tape across the coin, that is slowly wearing off. The last image shows it looks like it is going away with circulation. Report this Post to the Staff
tropicalbats Pillar of the Community United States 6116 Posts	Posted 08/21/2022 11:23 am Thanks folks! Those comments were super helpful and greatly appreciated. The knowledge base here is so deep and great to be able to tap into that. Report this Post to the Staff
jbuck Moderator United States 189301 Posts	Posted 08/22/2022 09:47 am Very interesting! 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
	Replies: 7 / Views: 1,644

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