Chelsea 10" Yacht Wheel, aka Pilot, Ships Bell Clock. Chelsea yacht wheel clocks with 10" dials are almost impossible to find. This is only the third example known to exist. The clock is 23" wide from tip to tip of the spokes. Serial number 179568 on the case dates the clock to 1927. The movement with serial number 172757 has been completely overhauled. The case has been polished and lacquered.The dial has been resilvered. The clock is in prime condition in every way.