Possible Doubled Die Mintmark? Help Please (Lincoln Memorial Cent / LMC 1986-D)

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Author	Replies: 9 / Views: 449
BJsCoins1 New Member United States 23 Posts	Posted 03/14/2024 11:00 pm Hello, I need a little bit of help identifying if this is a true double die or just Machine Doubling. Thanks * Edited by Staff to Add Year / Mintmark / Denomination to Title. It's very important to have in the title. * * Moved by Staff to a more appropriate forum. * Report this Post to the Staff

Errers and Varietys Bedrock of the Community United States 73798 Posts	Posted 03/14/2024 11:15 pm Looks like Split Plating. https://www.error-ref.com/split-plating/ Errers and Varietys. Report this Post to the Staff
BJsCoins1 New Member United States 23 Posts	Posted 03/14/2024 11:23 pm Would this carry any additional value? Errers and Varietys Report this Post to the Staff
John1 Moderator United States 56855 Posts	Posted 03/15/2024 04:24 am I agree with split copper plating, no added value. John1 Report this Post to the Staff
BJsCoins1 New Member United States 23 Posts	Posted 03/15/2024 07:58 am Thanks Report this Post to the Staff
jbuck Moderator United States 187834 Posts	Posted 03/15/2024 12:36 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
Cujohn Pillar of the Community United States 7174 Posts	Posted 03/15/2024 2:58 pm to the CCF and Report this Post to the Staff
Dearborn Moderator United States 95066 Posts	Posted 03/15/2024 10:46 pm this exhibits a split plating. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
johnhenry9009 Valued Member United States 244 Posts	Posted 03/15/2024 10:51 pm Report this Post to the Staff
BStrauss3 Pillar of the Community United States 4589 Posts	Posted 03/16/2024 09:37 am The correct numismatic term is doubled die - it is the die that would have had doubled elements during production. All coins are struck with double dies - an obverse and a reverse die. Mechanical or Machine Doubling (MD) occurs when the planchet shifts a tiny bit during striking. It's sometimes called Strike Doubling. It's not considered an error, just an artifact of the production processing. Modern cents (since mid-year 1982) are made of copper plated zinc. During the strike, the copper plating can split, causing "split plating doubling". Also, it's not an error, another artifact. The other one you will see is Die Deterioration Doubling. As coins are struck, not only does the die change the shape of the planchet, but there are more limited effects to the die too. This is also why the design elements move outwards to the rim (and why L on the rim is not an error). https://www.error-ref.com -----Burton 50+ year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club Owned by three cats and a wife of 40+ years (joined 1983) Author: 3rd Edition of the Sample Slabs book, https://www.sampleslabs.info/ Report this Post to the Staff
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Possible Doubled Die Mintmark? Help Please (Lmc 1986-D)