2-Day Marine chronometer movement with Hartnup's Balance Dial engraved J. Bryer 53 and 54 Barbican London 2485 2-Day Marine chronometer movement
Eight-day ship's chronometer by George Margetts, London, England, 1790-1808. Made for Capt. Sir Thomas Williams, R.N.; with two keys, two photographs and two letters. Eight-day ship's chronometer by George Margetts 1790-1808
2-day marine chronometer, No. 173, with fitted case and key, by Lewis Recordon, London, England, 1790-1810 2-day marine chronometer circa 1800
Chronometer (marine) by Earnshaw no.705, with Airy's bar in box and case Chronometer (marine) by Earnshaw no.705 1801-1830; 1871
Half-quarter repeating chronometer watch movement by Thos. Earnshaw including dial with hour hand and one gear wheel Half-quarter repeating chronometer watch movement
Small chronometer ("Arnold 488"), in gimbals, with two keys. In mahogany case with key Small chronometer ("Arnold 488") 1801-1830
Omega Seamaster Professional Chronometer self-winding mechanical wristwatch with stainless steel case and bracelet, type no. 2531.80, serial no. 60265297, water resistant to 300 metres, with helium escape valve for deep dives, in presentation case, by Omega, Switzerland, 1998. Omega 'Seamaster Professional' chronometer wristwatch 1998
Chronometer escapement by John Arnold, no. 371, London, England, 1780-1790. Chronometer Mechanism by Arnold, England, 1780-1790 1780-1790
Marine chronometer with Brockbanks-Peto cross detent escapement. With brass case and hand Marine chronometer
Chronometer (marine) by J.R. Arnold, London, No.532 in box Chronometer (marine) by J.R. Arnold 1801-1830
Model of chronometer escapement, for use with a projecting latern, made by Dent, 1950-1883. Represents the detent chronometer escapement, invented by Thomas Earnshaw 1777-1787. This escapement was typically used in marine chronometers. Model representing Earnshaw's detent chronometer escapement, 1950-1883 1950-1883
Working model of marine chronometer escapement with driving weight, parts of weight drive and parts of driving mechanism Working model of marine chronometer escapement with driving weight