A two-day 'Hezzanith' marine chronometer, Heath & Co. Ltd No. 2230-2937, the silvered dial signed Heath & Co. Ltd. Observatory Works Crayford. London, Roman hour numerals, gold hour and minute hands, subsidiary seconds dial inscribed "Heazzanith" 2250-2937, up-and-down dial, blued steel hands, Earnshaw escapement, cut bimetallic balance, circular heat compensation weights, blued steel helical balance spring, spring foot detent, brass bowl, gimballed on three-tier brass sprung mahogany box, ivory disc to middle section inscribed Heath & Co Ltd 2230-2937 Crayford, London, flush recessed handles, dial dia -- 4 1/8in. (10.4cm.), box -- 7in. (18cm.) wide