I’ve not seen this before 2016 Shield cent 1 1

[Mr.Bill347]

PMD supremo

coin is very smooth, sharp edges, weighs just 2.0 grams, 17.8mm wide 1.2 mm thick.

normal is 2.5g 19mm

never saw one so smooth exposing the zinc layer but as smooth as a butter knife. Maybe stuck in a coin machine ? Who knows 

 

[James Zyskowski]

Well now.  Looks like a dryer job but appears to have suffered some other fate. Interesting 😉

[Conder101]

Looks like it has been ground down and since then the zinc has corroded giving it a dark appearance.

[Greenstang]

Not a Dryer Coin.

As Conder101 stated, it has been ground down on both sides. Have seen quite a few of these lately, nearly all done intentionally.

[Coinbuf]

Almost like someone wanted to make a reverse proof like look to a circulation coin, perhaps a test piece that was used to perfect the craft to deceive a buyer.

[Mohawk]

On 1/4/2022 at 12:19 PM, Conder101 said:

Looks like it has been ground down and since then the zinc has corroded giving it a dark appearance.

I'm with Conder on this one.  I think he nailed it....ground down and the zinc has darkened from exposure to the air.  If you look at old zinc coins, like those issued by Germany and Czechoslovakia in the 1920's, they're often black in coloration.  Zinc does that over time as it's exposed to the air.  Here's an example: