What would this be used for?

[jml818]

I dug this in a field around some old houses. Looks like it may have a purpose with the straight edge?

 

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[releventchair]

Horse tack/ harness related.( Roger Ring for a driving bridle) Flat held leather strap. Or better said, strap supported the ring.

 

[jml818]

Me thinking horse related too,,sure is old and crusty

 

[Dharmacy]

I would also say horse tack hardware. I have seen some of these ID'ed as Sword Hangers, but don't think it is that.

 

[creskol]

It is part of a gag swivel.. see this previous post: http://www.treasurenet.com/forums/what/205786-civil-war-site-brass-what.html