Guilloche enamel in excellent condition with no issues. The small screw off top was likely made for holding perfume or perhaps smelling salts. Smaller at 2 5/8 inches tall and 3/4 inch wide. Likely for smelling salts but was never used. Sterling is marked along with some hallmarks. Likely English or French. Very clean and perfect, the inside of the top is cork. Made between 1900-1920. Perfect enamel.