Any ideas?

[SCDigginWithAK]

No clue does anybody know? On the back it has like folded edges.

 

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[BigBiloxi]

has the general shape of a side plate from some type of firearm but can't tell about any screw holes and the edge configuration.........

 

[cudamark]

Looks like a section of a tin sign to me.

 

[SCDigginWithAK]

its iron not tin but maybe part of a sign

 

[SCDigginWithAK]

i think its too thick to be a side plate

 

[Ammietuar]

It looks like part of the top to a wood burning stove. Removeable cover plates would go over the circular holes. If google would work for me Id attach a pic.