someone had too much time on their hands and did an acid bath ,to see what it would do. Would be my guess
The copper between the clad layers was exposed to a harsh chemical. And the Cupro-Nickel clad has toned due to the environmental exposure. Corrosion. Not a mint error of any kind.
You need to explain why you think it spent some time in a parking lot means.. I don't understand why you stated that Look at my post and see how I gave a descriptive definition.
the coin is rough and has been exposed to the elements. It looks somewhat typical to a coin a find metal detecting from the ground or beach. A parking lot coin has lots of dings and nicks from being run over by cars and damaged by the blacktop. the edges do look as if it was in some kind of acid which ate away the metal. spend it quick while it is still worth 25 cents!
It was flushed down the toilet went through the sewer pushed out on to the parking lot. Coiner's medical report, Death by environmental drowning. Next.
Yep, exposure to an acidic substance, like @paddyman98 said. There have been several posted here in the past that look almost identical. The softer, inner copper core, recedes as it is more effected by the acid.
Why don't you try it? You need to make a small pinhole in the plating so the soda can react with the inner Zinc.
I'll report back my findings, just don't drink that crap... 39 grams of high frutcose corn syrup that equates to 9.5 teaspoons of sugar, about 25% of a glass!
