Extremely rare Chelsea 12 inch pilothouse clock, movement number: "177792" which is stamped Chelsea Clock Co. Boston U.S.A.. The clock has a 12 inch engraved silver dial with waxed Arabic numerals and has the engraved signature below the winding post which states “CHELSEA CLOCK CO. BOSTON U.S. A. . Below the numeral "12" is a large second bit which is engraved: "NON-MAGNET". To the right of the second dial is a slow/fast adjustment. The clock retains its yellow brass case with hinged bezel. (CL-572)
Note: The non-magnetic feature allows the clock to be near large machinery like steam engines.
Reference: Dementer, Andrew C. and David D. Dementer, "Chelsea Clock Company: The First Hundred Years", 2001. An almost identical 12 inch pilothouse clock appears on both the dust jacket cover as well as the frontispiece to this book.
Condition: The case has been recently polished and lacquered. The dial has been resilvered. The movement has been recently overhauled and is in good working order.
Dimensions: Diameter of Dial 12 inches, Diameter of Bezel 14 1/4 inches; Depth 3 3/8 inches.