Very pretty bangle stamped " Sterling Siam. Other hallmarks are faded. The bangle has rectangles of cobalt blue, bright turquoise blue and grass green enamel. The design goes all the way around. The bangle is 3/8" wide. Inside diameter is 2 1/2" wide. Fits my average 7 1/4" wrist fine. Around the enamel segments there is a pretty engraved design. The bangle has a silver safety chain and snaps securely closed. With a 10X loupe I see a few edge losses but overall excellent condition for age. I would date this colorful bangle at c1950's.