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Marine Timekeeper known as 'H5' by John Harrison and Son 1770

1770

Marine timekeeper with constant force escapement by Josiah Emery

1792

Chronometer watch in silver case by John Arnold and Son

hallmarked 1788

Chronometer watch by Thomas Earnshaw No.498

Chronometer in Gold Case by Thomas Earnsham, 1795-1810

1795-1810

Two day marine chronometer by Morris Tobias

circa 1830

Chronometer with case and accessories

circa 1800

Swiss movement (incomplete and broken) with chronometer escapement

Chronometer watch movement

Marine Chronometer by Mercer, 1860-1930

1850-1880

Omega Marine Chronometer, 1950-1976

1950-1976

Chronometer Watch in Silver Case, 1820-1833

hallmarked 1833; 1820-1833

Chronometer in Silver Case by Thomas Earnshaw, no 837, 1810-1825

hallmarked 1825

Chronometer escapement

1810

Chronometer escapement

1790

Ferguson solar chronometer and astronomical compass

1912

Chronometer escapement

Marine timekeeper with constant force escapement

1795

Fotoski Auto Declancheur Chronometreur

1925-1935

Chronometer movement in brass cage

1925

Two-day marine chronometer by John Arnold and Son (No 63)

1771-1800

Chronometer

Survey chronometer type SC, by Mercer

Electronic f300 Hz Seamaster Chronometer wrist watch

1972

Chronometer Watch in Silver Case, By Arnold and Son, 1850-1872

1850-1872

Chronometer in Silver Case by Thomas Earnshaw, 1800-1834

1800-1834

Crystal Controlled Marine Chronometer by Patek Philippe, 1965-1984

1965-1984

Chronometer

Field chronometer, mark IV, no 1621. memorabilia.

Chronometer escapement

Marine timekeeper, chronometer, by James Murray, London, England, 1824

Marine timekeeper

1824

Marine timekeeper, by William Hardy, London, England, 1796-1816

Marine timekeeper

1796-1816

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

Marine chronometer type 422A and box

Marine chronometer type 422A and box

2-day marine chronometer, No. 173, with fitted case and key, by Lewis Recordon, London, England, 1790-1810

2-day marine chronometer

circa 1800

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

Set of components of Mercer marine chronometer

Set of components of Mercer marine chronometer

2-Day Marine chronometer movement with Hartnup's Balance Dial engraved J. Bryer 53 and 54 Barbican London 2485

2-Day Marine chronometer movement

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

Chronometer escapement by John Arnold, no. 371, London, England, 1780-1790.

Chronometer Mechanism by Arnold, England, 1780-1790

1780-1790

Small chronometer ("Arnold 488"), in gimbals, with two keys. In mahogany case with key

Small chronometer ("Arnold 488")

1801-1830

Marine chronometer with Brockbanks-Peto cross detent escapement. With brass case and hand

Marine chronometer

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

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

Chronometer (marine) by J.R. Arnold, London, No.532 in box.

Chronometer (marine) by J.R. Arnold

1801-1830