Fleur-de-lis watch pin. Flat design with two "petals" curling up instead of down. Likely rolled gold. Front has simple engraved lines. On the back there is a round hinge, modern safety clasp and large hook for a small watch. PSCO (Plainsville Stock Company, Plainsville, MA since 1870s) engraved on the large hook. 1" long. 1 3/16" wide