Bronze disk?

[Garabaldi]

Any ideas what this could be? Horse mount? Button? It gave a great ring as penny. Nice patina.
It has a tiny hole in the middle. Any ideas what this could be and how old?

 

[BioProfessor]

Drawer pull decorative back plate.

Daryl

 

[Bramblefind]

I found something like that before - I've since decided it was the top of a large tack