Turtle plastron?

[SnakemanBill]

A buddy sent me these pics. Don’t think they’re fossilized.
I was thinking it might be part of a turtle plastron?
Many thoughts?

 

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[old digger]

Looks like a turtle plastron to me. In what type of situ was it found?

 

[SnakemanBill]

Looks like a turtle plastron to me. In what type of situ was it found?

It was found on a beach on the Chesapeake Bay. Found while hunting for artifacts.