Chelsea Ball Watch Co. Regulator. This is a rare Chelsea Clock Company pendulum regulator made for Ball Watch Company, Cleveland. Only about 150 of these clocks were made. The clock is in fine condition with original dial, movement, glass, pendulum and hands. The superb original case finish has been waxed. The color and patina are gorgeous. The quality movement is signed and numbered 163492 dating the clock to December 1924. An excellent timekeeper that is ready to enjoy.