Winchester Co. "Brute Tamer" Brass Knuckles

This is one of the few items that my grandfather left behind before passing over a decade ago.  My grandmother recently cleaned out some of her things and said I could have it.  I thought they looked pretty cool (before finding out they are pretty much illegal everywhere) so I obliged.

These are just a couple mediocre camera phone pictures, but I can upload more if necessary.  The etching on the inside says "The Brute Tamer - Winchester Arms Co." I tried to look up some information on them through various avenues, but literally found nothing (probably due to the illegality factor). 

They also seem to be pretty small so I'm not even sure if these were really meant for use, maybe a paperweight or something?

Fair