76 Quarter possibly DDO?

is this an error

 

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Well yea,,,,,, it's sideways.

 

Where do you see doubling.
You need to tell us.

By the way.. A Doubled Die is classified as a Variety.
https://www.ngccoin.com/news/article/1655/Variety-versus-Mint-Error/

And

https://www.pcgs.com/news/mint-error-or-die-variety

Some information to help
Peace