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

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

1770
Chronometer watch in silver case by John Arnold and Son

Chronometer watch in silver case by John Arnold and Son

hallmarked 1788
Chronometer in Gold Case by Thomas Earnsham, 1795-1810

Chronometer in Gold Case by Thomas Earnsham, 1795-1810

1795-1810
Marine timekeeper with constant force escapement by Josiah Emery

Marine timekeeper with constant force escapement by Josiah Emery

1792
Chronometer watch by Thomas Earnshaw No.498

Chronometer watch by Thomas Earnshaw No.498

1763-1829
Electronic f300 Hz Seamaster Chronometer wrist watch

Electronic f300 Hz Seamaster Chronometer wrist watch

1972
Two day marine chronometer by Morris Tobias

Two day marine chronometer by Morris Tobias

circa 1830
Marine Chronometer by Mercer, 1860-1930

Marine Chronometer by Mercer, 1860-1930

1850-1880
Crystal Controlled Marine Chronometer by Patek Philippe, 1965-1984

Crystal Controlled Marine Chronometer by Patek Philippe, 1965-1984

1965-1984
Marine timekeeper with constant force escapement

Marine timekeeper with constant force escapement

1795
Fotoski Auto Declancheur Chronometreur

Fotoski Auto Declancheur Chronometreur

1925-1935
Ferguson solar chronometer and astronomical compass

Ferguson solar chronometer and astronomical compass

1912
Chronometer in Silver Case by Thomas Earnshaw, 1800-1834

Chronometer in Silver Case by Thomas Earnshaw, 1800-1834

1800-1834
Omega Marine Chronometer, 1950-1976

Omega Marine Chronometer, 1950-1976

1950-1976
Chronometer movement in brass cage

Chronometer movement in brass cage

1925
Survey chronometer type SC, by Mercer

Survey chronometer type SC, by Mercer

Chronometer with case and accessories

Chronometer with case and accessories

circa 1800
Chronometer Watch in Silver Case, 1820-1833

Chronometer Watch in Silver Case, 1820-1833

hallmarked 1833; 1820-1833
Chronometer Watch in Silver Case, By Arnold and Son, 1850-1872

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

1850-1872
Chronometer escapement

Chronometer escapement

1810
Chronometer

Chronometer

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

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

hallmarked 1825
Chronometer escapement

Chronometer escapement

Chronometer escapement

Chronometer escapement

Chronometer

Chronometer

Swiss movement (incomplete and broken) with chronometer escapement

Swiss movement (incomplete and broken) with chronometer escapement

Field chronometer, mark IV, no 1621. memorabilia.

Field chronometer, mark IV, no 1621. memorabilia.

Chronometer escapement

Chronometer escapement

1790
Chronometer watch movement

Chronometer watch movement

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
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

Half-quarter repeating chronometer watch movement by Thos. Earnshaw including dial with hour hand and one gear wheel

Half-quarter repeating chronometer watch movement

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

Chronometer Mechanism by Arnold, England, 1780-1790

1780-1790
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
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
2-Day Marine chronometer movement with Hartnup's Balance Dial engraved J. Bryer 53 and 54 Barbican London 2485

2-Day Marine chronometer movement

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

Marine chronometer

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

Small chronometer ("Arnold 488")

1801-1830
Chronometer (marine) by J.R. Arnold, London, No.532 in box.

Chronometer (marine) by J.R. Arnold

1801-1830
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 (marine) by Earnshaw no.705, with Airy's bar in box and case

Chronometer (marine) by Earnshaw no.705

1801-1830; 1871