It features a Bisbee turquoise stone surrounded by hand carved silver rope, and a double rail silver band that graduates to a solid silver band! The ring face measures around 20mmx19mm The ring size is around 8 Sterling silver. Sturdy 5.4 grams. Cir Mid Century + ring features the historic trader codes B uyers of older or vintage Native American silver jewelry may find various letters and numbers etched on the back jewelry. These marks may identify the silversmith (usually two or three letters) or a previous owner. If the etched letters don’t clearly identify an individual or there are three – four letters, it is likely they were created by a trader or dealer. Codes were usually etched or marked on an item with ink, or on an attached label. Most codes are created from ten-letter words composed of non-repeating letters, such as blackstone, cornflakes or cashprofit. The letters represent numbers 1 through 10. Wallace, trader and dealer at Zuni, used several price codes in his long career.