WWII US Maritime Commission 12 Hour Clock by Chelsea Clock, Boston-This is a heavy, brass clock. It is beautiful and works. We have included a reproduction key. The brass has toned a bit. The face has as well. The face reads "Chelsea Clock Co, Boston" and "U.S. Maritime Commission, Ser. No 818". The serial number stamped into the reverse matches the one stamped onto the movement, 296939 preceded by an "L" on the reverse. This indicates production in 1940-41. Great condition!