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Early pendulum clock by Salomon Coster, c.1657.
"Haagsche Klokje" by Salomon Coster (1657-59)
Caesium atomic clock, 1955.
NPL caesium atomic clock of 1955 (less associated electronic equipment)
Kundo 'Space Timer' radio-controlled quartz desk clock, 1988.
Kundo Space Timer Clock, synchronised to the 77.5 kHz time signals from the DCF 77 radio transmitter at Mainflingen, near Frankfurt, Germany, made by Kieninger und Obergfell GmbH, St Georgen/Schw, Germany, in 1988.
Byzantine portable universal altitude sundial with geared calendrical device
Brass components from Byzantine portable universal altitude sundial with geared calendrical device, unsigned, Middle East, 401-600
Clock used for transit of Venus observations, 1769
Regulator clock by John Shelton with glazed mahogany case. One of five such clocks sent with Royal Society expeditions to observe the Transit of Venus on the 3rd June 1769.
Lantern clock with verge escapement and rach and s
Lantern clock with verge escapement and rach and snail escapement (bob pendulum missing); hours on dial divided into quarters; going and striking trains; one hand
Barograph clock by Alexander Cumming, 1766
Barograph Clock by Alexander Cumming, 1766. From 1814 onwards, this clock was used by the famed meteorologist Luke Howard to make systematic observations that are among the world’s first urban climate studies. It incorporates a mercury barograph mechanism for measuring changes in air pressure, which are recorded on the circular paper chart around the outside of the dial. The clock had been made in 1766 by the noted London clockmaker Alexander Cumming, three years after he completed a similar device for King George III, a prominent patron of science. Two tubes of mercury are concealed in the fluted wooden columns visible inside the glass trunk door. An ivory cistern and a wood and ivory pen cage run in ivory rollers connecting the pressure-measuring mechanism to the recording dial. The clock is housed in an exuberant carved mahogany case believed to be by the esteemed cabinet-maker Thomas Chippendale.
Empire type world clock for indicating time around the globe
'Empire' type world clock for indicating the time around the globe at various longitudes with accessories, unknown maker, France, 1909. Patented by Etienne de Gounevitch and Armand Gustave Couailett (British patent No. 23, 449, 1909).
'Merkhet', Ancient Egyptian astronomical timekeeping instrument, bronze with hieroglyphic text inlaid with electrum metal, fitted with replica plumb bob, 600BCE. Inscription indicates it was the property of Bes, son of Khonsirtis (Khensardais var.), an astronomer priest of the god, Horus of Edfu in Upper Egypt. Used to layout axes of buildings and to determine the hours of the night by observing the passage of selected stars across the north-south meridian.
Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", 1843-1897
Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", made by Hunt and Roskell Limited, Clerkenwell, London, England, 1843-1897. The face of the instrument reads: 'This needle is deflected precisely at each hour, Hunt & Roskell Ltd, jewellers and watchmakers'
Cristalonic Solar-Quartz Wrist Watch, 1960-1976
Cristalonic Solar quartz time computer, 1960-1976
Japanese Lantern Clock, Unsigned, 1801-1900
Japanese lantern clock, with iron movement, fixed dial and rotating hour indicator, 1801-1900
Pendulum clock designed by Galileo in 1642 and made by his son in 1649, model.
1642-1649 (original); 1883 (model)
Model showing the first idea of the application of the pendulum to the clock designed by Galileo in 1642, made his son Vincenzo in 1649 and illustrated by Vincenzo Viviani, Italy. This model is by Eustachio Porcellotti, Florence, Italy, 1883.
Cylinder watch in silver pair case by Ellicott, Lo
Cylinder watch in silver pair case by Ellicott, London, no.7778, hall marked 1773
"Shepherd's" pocket column sundial
Wooden "Shepherd's" pocket column Sundial
Model of a Television Set Tammeter, 1955-1965
Small external model of a TV set with Tammeter mounted above, made by Television Audience Management Limited, London, England, 1955-1965
Early Persian brass sundial compass
Early Persian brass sundial compass (compass needle missing)
Cast of a Saxon Sundial, original at Kirkdale Church, Yorkshire
1935-1958 (reproduction); 1055-1064 CE (original)
Plaster cast of the Saxon sundial on Kirkdale Church, Yorks, originally made 1055-1064 CE, reproduction cast made 1935-1958. It marks the daylight period into four equal periods, using a horizontal gnomon which is now missing.
Clock dial marked 'Potter, Railway Time', 1840-1880
Clock dial marked "Potter, Railway Time" with two hands, unknown maker, British, 1840-1880
"Ingersoll" wrist watch
"Ingersoll" wrist watch with leather strap, pin pallet escapement and luminous hour hand, 1915
18-carat gold openface lever pocket watch signed 'VULLIAMY, mxuz LONDON'
18-carat gold openface lever pocket watch signed 'VULLIAMY, mxuz LONDON', with chain and key, hallmarked for London, 1847, with normal minute hand for showing mean time and additional minute hand for local time, and with table inside back of case showing differences from Greenwich time for various cities
Chronometer watch in silver case by John Arnold an
Chronometer watch in silver case by John Arnold and Son, London, no.360/661, case. Hall marked 1788
Chronometer watch by Thomas Earnshaw No.498, with
Chronometer watch by Thomas Earnshaw No.498, with later barrel cover numbered 2829, balance cock and regulator. In 18 ct. gold case hallmarked 1807/8
Chronometer in Gold Case by Thomas Earnsham, 1795-1810
Gold-cased Chronometer watch no.728 made by Thomas Earnshaw, 1795-1810
Bracket timepiece in mahogany case with silvered d
Bracket timepiece in mahogany case with silvered dial signed "Dutton & Co, London, V R 1874". Supplied by C. Sansom, Montpelier Street, Clockmaker to the Department of Science and Art (South Kensington Museums)
Watch with Flamenville dead-beat escapement, signe
Watch with Flamenville dead-beat escapement, signed Josh Harris, London, 120. In silver pair-case with London hallmark for 1759
Synchronous mains electric clock of the self-start
Synchronous mains electric clock of the self-starting type, with digital display. Made by The Westinghouse Electric Supply Co. USA. Early c.1934's
Casio gents LCD digital watch, black resin case an
Casio gents LCD digital watch, black resin case and strap, in packaging, model F-91W, with alarm, stopwatch, 7-year battery life. 1999.
Cylinder watch in pinchbeck inner case, tortoisesh
Cylinder watch in pinchbeck inner case, tortoiseshell (damaged) outer case by John Holmes, Strand, London, no.6808
Column dial by Henry Robert, Horloger, au Palais R
Column dial by Henry Robert, Horloger, au Palais Royal, paper on wood, early 19th century
Verge watch in silver inner case, shagreen outer c
Verge watch in silver inner case, shagreen outer case by Jas Shearwood, London, no.3028, silver dial, calendar. Hall marked 1759 (damaged)
Electric clock with Hipp toggle switch and directly impulsed horizontal balance wheel. Patented by T J Murday in 1910 and made by the Reason Manufacturing Company Ltd., Brighton. (No 207)
House clock, balance-wheel brass lantern clock
Balance-wheel brass lantern clock, with two driving weights and one counterweight, by Thomas Knifton, Cross Keys, Lothbury, London, England, 1645-1655.
Starburst LCD Analogue watch by Texas Instruments,
Starburst LCD Analogue watch by Texas Instruments, the first analogue watch without moving parts, introduced in 1978. Transferred from temporary inventory no.TN7
Willis world clock, 1929-1935
Example of the Willis world clock, with winding key (for showing local time in any part of the world), patented by John Henry Willis in 1929, made by J. H. Willis and Company, Norwich, England, 1929-1935.
Pulsynetic master clock, type C7.
Pulsynetic time transmitter type C7, in special case with movement dropped so as to be visible, by Gent and Company Ltd of Leicester, England. Exchanged in August 1951 with the earlier Pulsynetic transmitter (1913-166).
Early Balance Spring Pocket Watch by Thomas Tompion with Regulator Type Dial, 1675-1679
Early balance spring watch by Thomas Tompion with 'Regulator' type dial, in silver case, London, England, 1675-79.
Movement of regulator clock by Vulliamy, about 1760
Clock made by Benjamin Vulliamy for His Majesty George III, and used in his Observatory at Kew. In polished mahogany case, with a side plate and glass top for case
Harrison's eight-day wooden clock movement, 1715.
Original eight day clock by Harrison, date 1715, wheel work mostly of wood. With correspondence concerning Harrison clocks
Sinclair 'Black Watch' with LED display
Quartz watch with LED display, Sinclair 'Black Watch, with attached control unit, step-down transformer and display stand, and watch kit by Sinclair Radionics Limited, St Ives, Cambridgeshire, England, 1975-1976. Plastic case and batteries missing.
Two-thirds scale copy of the Hampton court astronomical clock dials, with epicyclic gearing unit, outer fixed chapter ring and rotating astronomical dial
Two-thirds scale copy of the Hampton court astronomical clock dials, with epicyclic gearing unit, outer fixed chapter ring and rotating astronomical dial. (With synchronous driving motor, gear-box and clutch unit supplied through Ministry of Public Building and Works)
Standard synchronome clock (with dial) fitted with Shortt synchroniser
Standard synchronome clock (with dial) fitted with Shortt synchroniser; clock (with dial) presented 1912. Ex: 1912-223; movement and pendulum exchanged for modern movement etc. 11. 3.1935; Synchroniser purchased #8.10, March 1935. Made by the Synchronome Company Ltd., (in association with William Hamilton Shortt), London, England, 1900-1935.
Primitive Egyptian Altitude Sundial or Shadow Clock
Primitive time measuring device consisting of wooden board with horizontal wooden gnomen or 'goal posts', the position of the shadow cast by this traverse piece indicates the passage of time, Unsigned, Egypt, 1000-800 BCE
Astronomical Watch by George Margetts, 1750-1810
Astronomical watch by George Margetts No.3043 in pair case, 1750-1810
Bulova 'Accutron' electronic wristwatch, c. 1963.
Bulova 'Accutron' tuning fork, controlled electric watch on sloping wooden stand, with one animated diagram illustrating its mode of operation, designed by Max Hetzel, made by the Bulova Watch Company, Inc., New York, United States, 1960-1963.
Pedestal astronomical clock by Samuel Watson, Lond
Pedestal astronomical clock by Samuel Watson, London, in ebonised case, with one cranked winding key and two door keys. Circa 1695. With 5 additional pieces Time Measurement gallery label: ASTRONOMICAL CLOCK A pedestal clock, signed Samuel Watson, London, and made about 1695. It is the earliest English astronomical clock in which the sun is fixed, on the Copernican principle, and it shows, besides the time of day, the date, the position of the sun in the Zodiac, the phase of the moon and its latitude (important for eclipse predicitons), and the times of sunrise and of moonrise and moonset; the time of high tide at London Bridge can also be read off. Samuel Watson was born in Coventry about 1635 and worked there until about 1690, when he moved to London. He died about 1710. A much more elaborate astronomical clock was made by Watson over the period 1683 to 1690, to the order of King Charles II; this clock is now in the Royal Library at Windsor Castle.
Bashforth's Chronograph with screens, frame and we
Bashforth's Chronograph with screens, frame and weights, invented c. 1865.
Hipp chronoscope with small galvanometer and key
Chronoscope and key. Designed for measuring short intervals of time with an accuracy of 1/1000th of a second. The clockwork is governed by a metal reed which vibrates instead of a pendulum. No.13074, made by Hipp, Neuchâtel, 1888