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 Replies: 14 / Views: 5,312 |
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Valued Member
United States
181 Posts |
This coin is a little thicker along the rim than other copper cents from the 1970's when making a sandwich with two other pennies. The rim is deep on the obverse and has some flaking along the rim. The west side of Lincoln's shoulder appears to be deeper in the field than on other samples. The rim on the reverse is not as deep as the obverse. Was something special done during the punching process?        |
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Bedrock of the Community
United States
62064 Posts |
Possible tilted die issue. Note the coin did have a fin on the rim at one time on the same side of the coin. weaker strike on the jaw area.
Question: Is the edge of the coin on the LIBERTY side thinner on that area and wider on the date area on the edges?
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Bedrock of the Community
United States
74658 Posts |
It's probably a Tilted Die issue as Coop said.
Errers and Varietys.
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Valued Member
 United States
181 Posts |
I can't find my digital micrometer. My manual one indicates that the west and east edges are the same thickness, 1/16" as well as the north. The south has a thickness of just a hair shy of the 1/16" mark.
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Pillar of the Community
United States
751 Posts |
Coop, wouldn't the rim still be equal around the coin if the die were tilted. The surface inside the rim would need to measured ?
You can lay something on the surface of the coin and measure the overall thickness of the surface that way. The repeat on the other side. It would of course be thicker than the actual coin, but subtract the thickness of the item you added from the overall thickness ?
Dan
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Moderator
 United States
56855 Posts |
We discussed the shoulder issue not too long ago, can't find the post though. John1  |
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Pillar of the Community
United States
2775 Posts |
The mints specs for cent thickness during this era, 1.52 millimeter = 0.0598425197 inch or 1/16 inch. That said the edge thickness for cents often varies. I'm intrigued by the shoulder issue as well as the Rim Fin. Thinking another similar (shoulder) example was displayed not to long ago. Note: multiple 1973 reverse dies had an anomaly known as a sunken die or die subsidence issue. When I see a reverse die example I often wonder about, why it just shows on the reverse dies and not the obverse dies. I see more research in my future. The simple answer on this obverse shoulder issue is die abrasion or movement. I need to do a side by side with a normal bust or shoulder. I'm also intrigued with the Rim Fin. It illustrates that a worn down Rim Fin doesn't necessarily wear nor fold over evenly inline with the inner design rim. I also try to inspect the edge and sometimes diameter closer to rule out any collar issues. Thanks, Doug. |
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Bedrock of the Community
United States
62064 Posts |
Sounds like the edge wasn't affected as much. I just remembered when you put cents into a tube, some look thinner on the edge of the coin. So I was trying to see if that was the cause or not. Sounds like it is not. Just testing the waters for now. To see if this was the cause of the one edge thinner coins. I guess I'm going to have to pull out a roll of these and see if the is some correlation as to what causes this. (Not the issue with this coin though) Might have to have Mike Diamond come in on this one. It is something different I don't remember seeing to often.
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Valued Member
United States
181 Posts |
In about two or three rolls after finding this first example, I have found another 1973 D that has a sharp-feeling rim, just like the first, but this second coin definitely has a visibly, thinner edge at the at the S to SSW (5:30 to 7:30 o'clock) region.
A third 1973 D has the same thinness like the second coin.
Neither the second or third coin has the dramatic shoulder issue as the first coin.
All three have the sharp-feeling rim/edge at their thickest regions.
I still detect no thinning around the rim of the first coin.
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Valued Member
United States
181 Posts |
I just found a forth 1973 D with thinning from SSE to S (4:30 to 6:00). No shoulder issue or other oddities.
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Bedrock of the Community
United States
62064 Posts |
Well if it is not on all of them, it is probably a Machine Doubling issue? (very high bounce over all other devices?) |
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Pillar of the Community
United States
751 Posts |
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Valued Member
United States
181 Posts |
I think I'm going to put the first coin in a 2x2.
What should I label it as?
"Fins / Tilted Die - Shoulder" ?
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Pillar of the Community
United States
2738 Posts |
I see a finned rim on the left side of the obverse -- an indication of slightly elevated striking pressure possibly caused by a very slight amount of die tilt. The back of Lincoln's coat appears to show the effect of Die Deterioration. It's not related to the fin. Error coin writer and researcher.
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Moderator
United States
56855 Posts |
Thanks for the link Panther,but I was referring to the shoulder thing. John1 |
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Replies: 14 / Views: 5,312 |
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Posted 02/17/2019 2:52 pm
