Each of these is a very substantial top quality sterling ring made by the firm Kabana which has specialized in sterling, platinum and 14K jewelry since the 1980s. The underside of each ring carries their name along with a copyright symbol and the word "Sterling." Each ring top has a somewhat convex translucent acrylic cover over a crisp photo of the musician. In the order of our photo the three rings portray Lester Young, Erroll Garner, and perhaps Eugene Sedric, a reed man in the 1920s Sam Wooding's Orchestra. The three rings are from the estate of renowned sculptor Ernest Trova of St. Louis. Most likely they date from the 1990s. NM displaying Mint.