I don't know how old it is but just junk metal so probably was once just costume jewelry or something. Looks like it was a finger ring when it was complete. It also may have had eyes stuck in at one point. Im only posting it because I thought it was a little different coming out of the hole! Haha
It looks like the face of a monkey. It appears to have horizontal side clips in back, but am not sure what it would have been attached to. It sure is neat looking! I wonder if it had stones for the eyes?
I agree with ring. Maybe some type of South America design monkey. Could have had different parts of the world mythical/legend type of designs on them.