Vintage Siam Sterling Silver Crescent Etched Niello Ring

This sterling crescent shaped ring has a cut-out hammered design on one outer edge with a rapousse edged tear-drop shaped enameled focal design of a dancer etched at the center. The ring is size 6 1/2 and the crescent measures 1 1/4" long x 3/4" wide. The signature SIAM STERLING is imprinted on the back of the design. The condition is very good with some shallow patina showing in the photo on the niello enamel. The patina does no show viewing the ring with the naked eye.