1991 S Penny 2.6 Weight Just Found It Why Is It So Thick

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Author	Replies: 13 / Views: 341
Trebest70 Valued Member United States 72 Posts	Posted 10/19/2026 8:48 pm Report this Post to the Staff

Dearborn Moderator United States 109800 Posts	Posted 10/19/2026 9:28 pm looks like it was in machinery and got rolled around for a bit to flatten out the rim. 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
Errers and Varietys Bedrock of the Community United States 80349 Posts	Posted 10/19/2026 9:52 pm It could also be struck on slightly rolled thick stock. Edit: I meant thick, not thin. Oops. Errers and Varietys. Edited by Errers and Varietys 10/19/2026 10:47 pm Report this Post to the Staff
JennyCents Valued Member United States 272 Posts	Posted 10/19/2026 10:01 pm 91-S is a proof coin - proof cents are always struck with squared rims and I'm guessing that would make them fuller plus not as much circulation wear as normal cents. Report this Post to the Staff
westernsky Pillar of the Community United States 7736 Posts	Posted 10/19/2026 11:25 pm with JennyCents! Report this Post to the Staff
lcutler Pillar of the Community United States 1681 Posts	Posted 10/20/2026 04:02 am Yep, proof coin. The coin itself is not really thicker, the sharp square edges just make the rim wider. Edited by lcutler 10/20/2026 04:03 am Report this Post to the Staff
ijn1944 Bedrock of the Community United States 19681 Posts	Posted 10/20/2026 06:57 am Cool find--impaired proof, yes. Report this Post to the Staff
jbuck Moderator United States 197806 Posts	Posted 10/20/2026 09:38 am Quote: proof cents are always struck with squared rims and I'm guessing that would make them fuller plus not as much circulation wear as normal cents. Nice find. 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
Dearborn Moderator United States 109800 Posts	Posted 10/20/2026 10:42 am huh, I missed that fact that it is an impaired proof 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
Trebest70 Valued Member United States 72 Posts	Posted 10/20/2026 3:59 pm The other penny is a 1977 s penny the 1991 s still looks thicker Report this Post to the Staff
jbuck Moderator United States 197806 Posts	Posted 10/20/2026 4:26 pm Probably still within tolerance. Maybe. 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
Dearborn Moderator United States 109800 Posts	Posted 10/20/2026 9:17 pm could have been from rolled thick zinc stock. 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
jbuck Moderator United States 197806 Posts	Posted 10/21/2026 10:44 am The Zinc got swole. 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
Brandmeister Pillar of the Community United States 6963 Posts	Posted 10/21/2026 11:09 am I have encountered many weak strike nickels. The slight curvature on the corner of the rims is really tiny. When you put them in a stack, they look far thinner than the coins around them. Folks are right, the squared off rim of the impaired proof cent just visually appear far thicker than circulated normal cents. If you measured those coin rims with a caliper in the middle of the rim, they would probably be very close to the same thickness. It's just the corners of the edges that make it look thicker. Report this Post to the Staff
	Replies: 13 / Views: 341

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