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1944-D Lincoln , Intrinsic Metallic Inclusion

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 Posted 05/18/2022  7:35 pm Show Profile   Bookmark this topic Add stoneman227 to your friends list Get a Link to this Message
I was going through some boxes to organize and realized that I had never imaged this one. Looks like a zinc globule didn't mix and was rolled to a line for the reverse of this 44. This one came from an unc. roll that I searched long ago.


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 Posted 05/18/2022  8:28 pm  Show Profile   Bookmark this reply Add silviosi to your friends list Get a Link to this Reply
You have three dots of same material on the coin. To me seem and fit with an electronic solder tip. We will see other's opinion also.
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 Posted 05/18/2022  9:05 pm  Show Profile   Bookmark this reply Add halfamind to your friends list Get a Link to this Reply
Like @Dearborn, never seen anything quite like it. Struck through something? If it's UNC, it probably hasn't been tampered with.
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 Posted 05/18/2022  9:06 pm  Show Profile   Bookmark this reply Add Mrhakfbacon to your friends list Get a Link to this Reply
Lamination?
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 Posted 05/18/2022  9:27 pm  Show Profile   Bookmark this reply Add stoneman227 to your friends list Get a Link to this Reply
With this new pic it's definitely not a lam as the shape of the anomaly at the edge is dovetailed. This would indicate that during the strike the coin metal flowed over something to form the rim. This now makes me think this coin was struck through something that has been partially retained. Hmmm
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 Posted 05/18/2022  9:38 pm  Show Profile   Bookmark this reply Add silviosi to your friends list Get a Link to this Reply
Sorry for my first post, I didn't see it is incuse. So it is struck through. The white must be some oxide.
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 Posted 05/18/2022  9:53 pm  Show Profile   Bookmark this reply Add -makecents- to your friends list Get a Link to this Reply
J, you are one of the last people I would question, you have probably taught me as much as anyone, about Lincolns but take a look at what looks to run parallel the the reverse. Does it go through? Mrhakfbacon may be on to something.
As always, great pics!


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 Posted 05/18/2022  10:41 pm  Show Profile   Bookmark this reply Add stoneman227 to your friends list Get a Link to this Reply
Interesting !
If nothing else the anomaly on the reverse follows the direction of the roller lines. That's a vote for it being an inclusion in the planchet.

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 Posted 05/18/2022  10:41 pm  Show Profile   Check tropicalbats's eBay Listings Bookmark this reply Add tropicalbats to your friends list Get a Link to this Reply
Quite an interesting coin. My thoughts follow OP's and others, and can't come up with a final conclusion. The grain of the coin can be seen in the coloration of the obverse, and the anomaly follows that angle. The white very much appears to be zinc corrosion. That would lead to a lamination after strike along a bit of poorly mixed alloy allowing for the exposure of a strip of zinc which corroded in place. But there is some reason to believe it could be a struck through zinc scrap as well.
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 Posted 05/18/2022  11:34 pm  Show Profile   Bookmark this reply Add Spence to your friends list Get a Link to this Reply
An interesting piece! My vote is for this being a detached lam with foreign residue (e.g. baking soda) partially filling the void. The three round pellets appear to be granules that have migrated out of that gap.

Thoughts on giving this a soak in distilled water and/or acetone?
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 Posted 05/19/2022  06:35 am  Show Profile   Bookmark this reply Add stoneman227 to your friends list Get a Link to this Reply
Spence , just a note this AM. Because of the dovetail shape that the copper rim has formed, I don't thing a lamination has occurred. In my work, I use dovetailed shape slots to reliably anchor materials together. Because the rim has formed this shape, I feel a lam could not have escaped that slot.
Whatever material that had filled that gap in the rim , has to me, oxidized and crumbled away over time with the remnants being seen in my pics.
Soaking the coin, I feel , would not be the right thing to do as it would remove the last evidence of what was there before the strike.
Edited by stoneman227
05/19/2022 06:36 am
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 Posted 05/19/2022  07:27 am  Show Profile   Bookmark this reply Add Spence to your friends list Get a Link to this Reply
Yes fair enough. It is your coin and of course you should do with it as you please.

With respect to the dovetail feature on the rim, I'm 100% in agreement with you in regard to relatively unyielding materials (e.g. wood or blocks of metal). In this specific case of a thin strip of copper, however, I don't see why it couldn't have deformed as it tore away from the bulk metal of the coin.

If you happen to have good access to a local university, you might be able to get some time on the scanning electron microscope with a prof or grad student. EDS would help to determine what proportion of which elements are in that strip.
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"The danger we all now face is distinguishing between what is authentic and what is performed."
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 Posted 05/19/2022  5:09 pm  Show Profile   Bookmark this reply Add silviosi to your friends list Get a Link to this Reply
I agree with what was say, Trop, Spence, Stone. An Lab with SEM-EDX will be the best if I took in consideration some oxide we see. An Medical school must have this, also metallurgical university also.
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 Posted 05/19/2022  7:42 pm  Show Profile   Bookmark this reply Add Petespockets55 to your friends list Get a Link to this Reply
I kind of like some type of material being "rolled-in" by the rollers making the sheets. Especially since the anomaly is going in the same direction as the roller lines.

Would an XRF scan work on degraded/oxidized metals?

If so, an XRF scan might tell you if it is a metal.
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 Posted 05/19/2022  8:08 pm  Show Profile   Bookmark this reply Add Dearborn to your friends list Get a Link to this Reply
Pete has something here, After looking at the newer pictures, I too, think that it added while being rolled out. I wonder how many more could be out there that was never found or recognized as something special to be considered.
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