10 inches. Manufactured by the Keystone Lantern Co. of Philadelphia, Pennsylvania, this Casey model railroad lantern was produced for the Pennsylvania Railroad. The piece features a metal frame with a protective wire cage and a top bail handle for transport. The chimney cap is embossed with the manufacturer name and city location, Philadelphia PA. U.S.A., along with a central keystone logo featuring the words The Keystone. The clear glass globe is embossed with a keystone logo containing the initials P R R. The lantern retains its original protective cage structure and circular base.