A TWO DAY MARINE CHRONOMETER, the silvered dial signed and numbered THOMAS MERCER Ltd ST.ALBANS ENGLAND 18104 Roman numerals, subsidiary seconds and up-and-down dials, blued steel hands, Earnshaw escapement, cut bi-metallic balance, palladium helical balance spring, flat spring detent to side of banking block, brass bowl and gimbal in two-tier mahogany box - 7¼in(18cm) square