Any ideas?

[brassmonkey]

Definitely has writing across the piece but I cannot make out many of the letters.

 

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[A2coins]

Is it iron

 

[A2coins]

Welcome to tnet

 

[brassmonkey]

Yes it is iron. After overnight electrolysis I can make out “70 B” on the middle line

 

[Tpmetal]

almost looks like part of a lawn mower or brushhog blade?

 

[Tony in SC]

Was it found on the beach or on farm land? If farm I would say its the piece that holds the plow or mold board in position on a mule drawn plow.

 

[brassmonkey]

A mile from the beach, not farmland though.
I think I can make out:
MODEL
70B
NEW STYLE

 

[TxDetex]

Maybe an auto part - Model 70B Willys
The 70-B series was introduced in 1929 and lasted into 1931, when Willys-Overland at last ended its fidelity to the sleeve-valve engine. In 1929 Willys-Overland brought out the Willys-Knight Great Six as a larger, more opulent series to challenge the luxury market in a final attempt to establish a Knight-engined car there.

 

[creskol]

I think it may be a piece broken off of an antique single-bottom plowshare or blade, similar to this one: