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"Litherland, Davies & Co. (/) LIVERPOOL (/) 236/12591 (/) U.S. ARMY"
bezel 5.5 inches diameter; backplate 3.4 inches diameter
Litherland, Davies & Co. was in business in Liverpool from 1816 to at least 1877, as a watch, clock, and chronometer maker. The U.S. Navy Bureau of Ships transferred this chronometer to the Smithsonian in 1953. Made around 1830, it is an 8 day instrument with an early Earnshaw spring detent escapement, and indications for hours, minutes, seconds, up and down. In the serial number, the first number is that of the instrument, while the second is that of all Litherland, Davies horological products to date.
Ref: Tony Mercer, Chronometer Makers of the World (Colchester, 1991), p. 191.