I found this piece at a jewelry shop in Athens, GA (Athena Jewelers) almost 2 years ago. I've been told that the style resembles Navajo designs. However, the stamp is BY, which makes it difficult to search.
The images are quite large (but still fuzzy) to try and show detail.
http://i.imgur.com/SR6Aw.jpg (design)
http://imgur.com/0F5wc (inside stamp, including Sterling -- the fuzzy line above)
Any help would be greatly appreciated.