Dating most likely to the 1920s, a graceful bell-shape with two shades of blue guilloche enameled timepiece casing is a great piece for that watch project. More elaborate in design than your average ball pendant watch, it is a stunning vintage creation that could attach to a chain and make a pendant watch. The enamel is gorgeous, with just a small area, plainly shown in the images that has some minor loss. Delicate silver accents, although it is not marked, I feel confident that it is sterling silver. The knob is a missing, and this casing is ready for your watch to make it complete. It is 1 ¼" high, about 1" in diameter at its widest. These antique watch parts are so hard to find and will be worth more than double the price paid here when this collectible project is complete.