
Underside. You can see in the center (both sides) that it looks like there is a hole going through it.
Edit: changed hold to hole... Autocorrect issue.

Underside. You can see in the center (both sides) that it looks like there is a hole going through it.
Edit: changed hold to hole... Autocorrect issue.
It looks like it snapped off of something larger. Is that dirt in the middle or a completely rusted bolt? I’m curious whether there’s threading at the center beneath the brown.
My first thought was to stick it in acid to get a better look tomorrow, until I read “1800’s - early 1900’s”
What sort of scale are we looking at here? To me, the raised perimeter and hole in the center looked like an old chevy tie rod end, but it would have to be in a severe state of decay.

My first thoughts were an ols zinc acid cell (battery), but not really sure what it is
From the top it looks like a skate barring, but i dont know how it got so junked up? Im probably wrong.
Are the edges rubber? Looks like a piston from a bike pump.
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