Can Anyone Identify the round items...

[gfordtx]

I found the following Items at the Site where there was a Wagon Factory during the Civil War in Texas...

Does anyone know what they are?

Thanks,

Gary Ford
Sgt of Arms
Smith County Metal Detecting Association

 

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[GatorBoy]

What are the made of? Metal?
They look like molten metal that cooled and hardened in a pot.