This little thing is a curiosity as I’m not certain what it’s for. It could be for a variety of things - maybe one of those things is one of your things and this would be perfect for you.
It’s the same diameter as a loonie coin and is about a half inch high. Easily fits in the palm of your hand as well as a pants pocket.
The face is painted black with a bull fighting scene etched in the same gold colour that covered the entire round box.
It has a tiny push button lock and metal hinge.