Quarter Blank Mint Error - Clipped - Proof? - Page 2

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Author	Replies: 21 / Views: 1,039	Page: of 2

jbuck Moderator United States 189199 Posts	Posted 05/06/2024 2:43 pm Interesting example! 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
mikediamond Pillar of the Community United States 2738 Posts	Posted 05/07/2024 11:32 pm This is not a proof blank. A proof blank would show a gleaming surface covered with shallow pockmarks. And a satin finish is imparted by the dies. It's not a property of the blank. Does this specimen show exposure of the copper core along the edge? If so, does the position of the copper core "flip" between the convex portion of the blank and the concave portion? Error coin writer and researcher. Report this Post to the Staff
tropicalbats Pillar of the Community United States 6116 Posts	Posted 05/09/2024 01:29 am Thanks Mike! I had no idea to even look at that but yes, the copper layer does show all the way around, but it flips between the concave and convex regions. So I'm guessing that means the original blank was punching in one direction, then it flipped over and was clipped from the other direction? Quite interested to learn more here. Report this Post to the Staff
mikediamond Pillar of the Community United States 2738 Posts	Posted 05/09/2024 08:12 am Asymmetric exposure of the copper core is due to one of the clad layers being dragged over the edge of the blank. The convex edge will have the bottom clad layer dragged over the edge of the copper core as the blank is forced through the hole in the perforated base plate. The concave edge will have the top clad layer dragged over the edge of the copper core by the edge of the blanking punch. Error coin writer and researcher. Report this Post to the Staff
Dearborn Moderator United States 97083 Posts	Posted 05/09/2024 1:13 pm thanks Mike, great information on what to look for... 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
tropicalbats Pillar of the Community United States 6116 Posts	Posted 05/09/2024 8:48 pm That is interesting. Certainly learned something new here, and not just to pay more attention to the edge on clad coin errors. Thanks Mike for the process details! Report this Post to the Staff
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