Ship's chronometer, Thomas Mercer Ltd., St. Albans, England, No. 16257, gimbaled in a wooden case, silvered dial with engraved and black lined Roman numerals, power reserve indicator, second hand, blued hands, movement with temperature compensation balance, torsion balance spring, spring wound via chain and worm, movement running, with key, h. 17.5cm, w. 18cm, d. 18.5cm