This is a gorgeous design by the noted Navajo Silversmith Tommy Singer.  I have not cloth cleaned it since I purchased it used back in1990. Signed T C where the C is a crescent moon, an early hallmark of Tommy Singer which means this piece is around 50 years old or older.  It is in very good vintage condition. Yes, you can polish the patina with a sterling cleaning cloth to make it look new again.  Many prefer the patina look.  This will fit a small wrist 6-7 inches.  Gently used over the years.
 
Tommy Singer (1940 - May 31, 2014) was a World Famous Navajo Silversmith and his distinct style of Indian Jewelry is recognized the world over. Tommy was a silversmith for over 50 years. He learned the art of silversmithing from his father when he was just 7 years old. His Father Tsinnigine Hathali was a Navajo Medicine man. His early works were done in the Silver overlay technique but soon began to feature Turquoise stones. While working with scrap turquoise chips, Tommy pioneered the technique of Chip inlay used by thousands of artists to this day. Tommy eventually returned to his roots by creating Exquisite Silver Overlaid Jewelry with intricate designs.