Lighthouse Clock

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The Lighthouse Clock is a style of clock produced in the mid-1820s through 1830s by American clockmaker Simon Willard at his established workshop in Roxbury, Massachusetts, where he spent most of his clockmaking career. The family home and earlier workshop in Grafton, Massachusetts has been converted to a museum.

The clocks — several styles exist — consist of a round or octagonal wooden base that rises in a tapered column, which is itself surmounted by clockworks that are covered by a glass dome, giving the effect of a standing lighthouse. The clocks are generally 24 to 30 inches tall. The notion of a clock under a dome may hark back to the imported, glass-domed, French Empire clocks fashionable at the time. Or, they might have been influenced by English and French skeletonized clocks; that is, clocks whose plates have been cut and exposed in such a way as to show the internal workings of the clock. Willard's clockworks were not skeletonized, but they often had an alarm mechanism and were known as patented alarm clocks. The alarm bell was mounted atop the clock movement. Clock mechanisms are driven by a weight concealed in the body of the lighthouse, though the alarm mechanism is sometimes driven by a separate weight raised by a pullcord.

Original Lighthouse Clocks are rare and have become very valuable; one sold at Sotheby's auction house on January 6, 2006 for US$744,000.