Chelsea 8 1/2" Clock & Barometer Desk Set. Ships Bell. Ca. 1920. This is the largest size Desk Set that Chelsea Clock Co. made and is almost impossible to find. The clock has a truly commanding presence. It has been completely restored and is in perfect condition in every way. The clock keeps excellent time and strikes ships bells with fine Chelsea tone. The barometer and thermometer are in excellent working condition. The beveled glass is perfect. Simply the best! Email me if you have questions.