We were not able to find any background information about the art deco vintage enamel centerpiece of this necklace but we love how it comingles with the deco brass stamping and the antique button. Every antique button is a one and only, chosen just for you, and so will not be identical to the image. This necklace features a sliding clasp that enables you to adjust its length to suit any neckline. You can wear it as a choker, as a long pendant, or anywhere in between. In this piece - One antique metal button, circa 1880-1918 chosen from our collection. Vintage art deco brass champleve enamel piece. Brass art deco stamping, made today in the usa in vintage dies. Antiqued brass chain. Chain adjusts from a 15" choker to 32" long pendant with sliding clasp.