Did I just find the real deal?! No clad layer quarter...
Kurisu
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Just came out of a roll...
Seems to be well struck, exact same thickness and size as a cladded one.
Looks to be a touch over on the weight... not a hint of clad anywhere...It's straight up orange 
@FredWeinberg @ErrorsOnCoins ???
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Not an expert, but I would guess some kind of PMD/environmental damage.
No, that is a damaged coin, sorry.
Environmental damage.
The splotchy color is a good indicator that it is environment damage.
It is also rare to find an example missing both obverse and reverse layers. And if it was, it would weigh less than a normal quarter.
I don't think so. I just found one myself. The normal one weighs exactly what you have. Mine weighs 4.7. Keep on hunting though.
"Jesus died for you and for me, Thank you,Jesus"!!!
--- If it should happen I die and leave this world and you want to remember me. Please only remember my opening Sig Line.Acetone might reveal the clad, if it's there.
As above...
No way. Normal thickness, weight. So no missing layers. Just crusty.
Looks like a typical "dug" coin from a metal dectorist - spent just a short time in the ground. They range from coins like the one you found to almost completely dark brown/black when you find clad in the ground.
PMD.
Could be acid stripped. That gives it that matte appearance.
thanks for the nice pics
There is definitely no clad. The color is crusty on the copper but not covering any clad...that's ALL copper 100% for sure.
So possibly an acid strip.
Coins are Neato!
"If it's a penny for your thoughts and you put in your two cents worth, then someone...somewhere...is making a penny." - Steven Wright
These types of coins have been posted here before - I even posted a nickel once that was copper colored. They are very familiar to many people here,
If it was acid dipped it would show signs of it, and the coin would be noticeably thinner.
Also, the "silver" layers are actually an alloy of 75% copper and 25% nickel, so with the right environmental damage the copper color predominates.
If you still think it is an error, you should pay up and submit it for PCGS's opinion, but if it were mine I'd prove to you what it is by taking a file to the edge and revealing 3 layers.
I actually did file a groove on the edge for a post in another forum on one of those quarters that was platinum plated to reveal the copper layer so everyone could see (it was actually @FredWeinberg who recommended I do it lol so I happily did!)... this one looks like a combination of nothing but copper colors (some of it with more patina and some with almost none) to me and doesn't look plated. Especially since the entire edge is a perfect match to a darkened copper penny.
I'm certainly not an error expert but I've been searching rolls since the 70's and have never seen environmental damage that makes the entire quarter convincingly look like copper... I'm hesitant to take an exacto knife to a groove in the edge of this one...
Also I would've expected some of the detail of the strike to be less sharp if it the lamination layer had been removed.
I 100% trust @ErrorsOnCoins response that this is damage of some sort.
Coins are Neato!
"If it's a penny for your thoughts and you put in your two cents worth, then someone...somewhere...is making a penny." - Steven Wright
Jbk is spot on. Ive dug many nickels and clad that get orangy red, and various shades of brown. Pretty typical damage from being buried.
the toning to me suggests copper plated
Absolutely environmental damage. The clad layer is an alloy of 75% Cu and 25% Ni. I can't recall the mechanism, but many types of environmental exposures will leave clad coins and nickels (same alloy) with a copper like appearance.
I'm guessing heat damage, but who knows the exact cause.
Based on thickness and weight, and your comments about it appearing to be pure copper (including edge, before destructive evaluation), I would say it has been copper plated, and then environmentally stained. The plating could account for the minor 'overweight' (5.69 vs. 5.67). PMD. Cheers, RickO
Here are some of my more recent metal detecting finds of clad coins- no attempt at cleaning made yet, When I get ready to spend or take them back to bank I will either soak or polish them and most will come out looking something like coin by original poster.
looks like a metal detecting dig. looks like it might have been dug in a playscape (dug a few of them before)