No Idea.

[Garabaldi]

I found this in a very historical area. Does anyone have any idea what this could be?

 

[Montana Jim]

Old piece of iron... I guess. Looks like a wheel hub spacer from a cart or wagon... of course some details are buried in the layers of rust.

 

[spartacus53]

Since it is so small, I was wondering if it's not part of a bearing

 

[johnnyi]

I agree with you Jim, it is too squat and thick for any kind of furrule. It is most probably as you said, an axel spacer from a wagon.

 

[Rasputin]

Looks like a bearing race to me.

 

[boomer46901]

It is a circle.