A Waltham marine chronometer, Waltham watch Co., early 20th century the 8-Day Navigational lever deck chronometer, enclosed in a weather proof case suspended on gimbals in a three-tier brass-bound mahogany box, inscribed to a white plaque '(N.W.) 57 C.W.' with the ordnance arrow, and 'Waltham' to a brass plaque, the matt silvered dial signed Waltham watch Co. And similarly inscribed, with Roman hour chapters, subsidiary up-and-down dial and seconds dial, lever escapement, 15 jewels adjusted. Height 12.5 cm, width 12.5 cm, depth 12.5 cm, (case)