I have a silver, 2-1/4 inch wide, what appears to be, cast, Native American, open cuff bracelet. The outside has stamps of many partial sun symbols, six bears in profile, and four symbols of what looks like an insect, or a comet? The identifying marks are "Sterling", and either an "M" or a "W", the letter being framed by an incomplete (?) box. Any ideas as to who designed and/or crafted this bracelet? Thanks.