Unusual Vintage Set Buffalo Nickel Button Covers, Drawings of Animals and Arrows

Description

This listing is for a set of six vintage Buffalo Nickel button covers.  These appear to be different than the others ones I have seen listed on eBay in that they have arrows on the back part that opens and drawings animals inside the button cover.  There is a buffalo, a dog, two goats, a bird and maybe a cow or a bull.  I do not know whether the backs are actual gold or not.
My relative who owned these was a big collector of Native American jewelry and had this in her collection.