1968 with 2.7 Gr

[GrumpyEd]

With these newer images I don't see 8.7% of the diameter missing from the rim of the coin. (2.7g divided by 3.1g = 8.7%) Just normal "closeness" for misaligned die and devices, especially IGWT, for '68. If it was missing 8.7% it would have to be rubbed down almost to the top of Lincolns head.

The reason is 2 things.

The rim is thicker than the fields.

It's also math of it, reduce the diameter across it but remember PI 3.14159 so the reduction in radius is 3 times the reduction in diameter. So it's tricking you, you reduce the diameter a little but the radius reduces 3 times as much and the rim is the thickest part which is where it's being removed.
It's not a constant weight/percent of diameter. Think of it like this, you take 1/16 rim off the outer edge of a coin, that's a bunch of metal but you take 1/16 off of the center (it's a tiny circle) then it's much less mass.

[GrumpyEd]

I doubt it's a thin planchet or a wrong planchet.

There isn't a smaller diameter copper coin to be mixed up with.

You can tell easily if it's a thin planchet or missing the edge..
If it was a thin planchet then it will be the right diameter.
Plug it in a folder for cents, if it's lose then it's smaller.

[jfines69]

Cool... Thanks for the follow up... Lots of environmental damage... I think it is a combo of mostly a thin planchet and a little loss of weight from damage!!!

[jfines69]

I doubt it's a thin planchet or a wrong planchet.

There isn't a smaller diameter copper coin to be mixed up with.

You can tell easily if it's a thin planchet or missing the edge..
If it was a thin planchet then it will be the right diameter.
Plug it in a folder for cents, if it's lose then it's smaller.

Now you got me wondering Very good point!!!

[GrumpyEd]

Simpler description.
Picture a coin as 10 rings getting smaller.
The outer one has a rim, it's much thicker.
By the time you get to the center ring it's a tiny circle.
You remove the outer ring, it's much more weight reduction than removing the center ring even though all of the rings are the same width.

If it's slightly smaller in diameter, it will weigh much less.

Also, look at the coin, no rim above the motto, only part of the rim below the bust. It looks like it's been filed away.

[Gatito360NY]

I can see that parts of the rim are thinner than others in the diameter this brings some more information?

[Petespockets55]

Simpler description.
Picture a coin as 10 rings getting smaller.
The outer one has a rim, it's much thicker.
By the time you get to the center ring it's a tiny circle.
You remove the outer ring, it's much more weight reduction than removing the center ring even though all of the rings are the same width........

Why am I suddenly hungry for a Large pizza instead of a small pizza?

Also, look at the coin, no rim above the motto, only part of the rim below the bust. It looks like it's been filed away.

But the new reverse images show a fairly consistent rim. Not filed or ground down unevenly, which is why I was leaning towards a misaligned die and thinner planchet.
Maybe a close up image of the third surface (rim edge) of the coin to look at striations/marks on the edge would help me.

Gatito360NY, what is the diameter of the coin in question?

[Gatito360NY]

Sorry i dont have a caliber but It's a good idea to measure it right
With a caliber
And you want a pizza cause all you guys are talking about ring and that make your brain think a large ring like large pitzza.... Lol
And when i get home latter today i will take a microscope pics to make 100% sure

[Petespockets55]

Sorry i dont have a caliber but It's a good idea to measure it right
With a caliber
And you want a pizza cause all you guys are talking about ring and that make your brain think a large ring like large pitzza.... Lol

Yes to measuring and to pizza!
But Ed's idea of putting it in a coin folder to see if it is loose or not is a great way to check the diameter if no caliper is available.
Also the image of the edge could be helpful to look for scratches (grinding or filing).
And whatever the final determination, I don't think there is much premium added to the coin (a couple of dollars?) even if it is rolled thin. It would be more along the lines of pride and satisfaction on your part for finding it!

[GrumpyEd]

I was leaning towards a misaligned die and thinner planchet.

On a misaligned die one edge would be missing some rim (top obv on this coin) then the opposite edge (below bust) would have a much wider than normal rim. This coin looks to be missing the rim on top and missing part of it below the bust. Also on a misaligned die the other side (rev) would be normal alignment and normal rim all around.

Sorry i dont have a caliber but It's a good idea to measure it right

Do you have a folder to see if it fits tight in a hole?

[Gatito360NY]

You mean where you put a cent for colección?
Ed its any way to upload video here ? I can make video 2 68' and you guys will see it

[GrumpyEd]

You mean where you put a cent for colección?

I mean if you have one of those folders with a hole for each year cents (blue Whitman coin folder), Plug it in one of the holes. If it is not tight then it's smaller than a normal cent.

[Gatito360NY]

That moment in which you realize that you are already an addict to the cents q you go to home deopot only to buy a caliper at 8 o'clock at night
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[GrumpyEd]

I have one like that, a Mitutoyo. Battery been dead for decades so I just read the scale and still works fine. haha

[Gatito360NY]

Well i think this is the best i can do Thanks Ed....!!!
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