Chelsea 10" Marine Clock for The Ashton Valve Co., Boston, Mass. Serial number 18184 on the movement dates the clock to 1905. The dial is marked below 6 "Boston Clock 109". The inside of the case is stamped 0.311. The original nickel finish on the case is in fine condition. The dial has the original silvered surface. The minute hand, hour hand, second hand and regulator are all original to the clock. A very fine all original clock and a fine timekeeper.