Diamond Cut 1974 cent with side Threads

Friends, Welcome.... In my Treasure hunt for a million cents so far I have found this one a few years ago.
I posted the pic on a post but someone said the were a bit dark.
So, I retook the pictures again.
I hope this is a real US mint Error.

Is it possible the US mint was experimenting with some new ideas, like they were with the Aluminum Cent?

It a rough DIAMOND shape cut with Ridges running on the side.

Appreciate your view and vote on the coin.

God Bless
Beck.
PS: Does someone else found on these,please let me know.

 

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It certainly didn't come from the mint like that.

Easily done with a vise.

 

Post Mint Damage.

 

ditto.

spend it

 

HECK NO! It's pre 1982 copper!

 

want to buy mine?

 

Soon as I sell mine, we'll talk!

 

That's an altered US Coin and should have COPY stamped on it.

Just so folks know.

 

Uh . . . NO! Still a real, legal tender, US coin. Altered, but still real.

 

No..

Hong Kong had a $5 Dollar Coin with that octagon shape

 

The condition of your coin was, in fact, a result of an experiment, but it was not an experiment conducted by the US Mint.

 

And the 1994 Canadian Cent also -