Short Iron bar with Ridges found on CW battlefield

[Sheldius]

This one is iron item from Civil War Battlefield. Two inches long, slight curve with one flat back and higher ridges on ends of curved top. CW gun part / equipment or farm piece? Reminds me of a wheel weight (sort of). Not sure if the "U" on left and "S" in center of last photo on right are real or just corrosion coincidence.

 

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[Monty]

This looks like an old folding pocket knife. Monty

 

[Retired Sarge]

Tire weight? All knifes I've seen are engraved, not embossed, just my opinion!

 

[Gunrunner61]

For some reason, I think that if you put that in Apple Cider Vineger for 3-4 day's you'll see an "A" on the right hand side, Just not sure on what it is....HH