Swiss steel sidereal time regulated observatory chronometer Circa 1954

Steel open faced chronometer by Ulysse Nardin
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A rare Swiss steel open faced sidereal time regulated observatory chronometer with a contact device for electrical seconds registration, circa 1954. Bridge movement with a Guillaume gold screw compensation balance. White enamel dial with Roman hours, an outer minute track, subsidiary seconds at 6 o’clock, power reserve indication at 12 and spade hands. The plain case with a screw back. Dial signed, case and movement signed and numbered. Comes with a mahogany transport and stationery box.
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Diameter: 65 mm
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Weight: 234 g
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Signed: Chronomètre Ulysse Nardin Le Locle Suisse
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Ulysse Nardin SA is a Swiss luxury watchmaking company. Founded in 1846 in Le Locle, Switzerland bearing the name of its founder Ulysse Nardin. It has remained in continuous production since. The company became best known for manufacturing highly accurate marine chronometers (of which the anker in the company logo is a reminder nowadays) used by over 50 of the world’s navies from the end of the 19th century till 1950. Furthermore, pocket watches with complications such as moon phases, a perpetual calendar, repetition and an alarm function were produced. According to the last official report of Neuchâtel Observatory in Switzerland, Ulysse Nardin had won numerous awards and honours for its marine chronometers from 1846 to 1975, including 4324 certificates, 2411 special prizes and 18 gold medals at International exhibitions.

Ulysse was born in 1823 in Le Locle, Switzerland. He first trained as an apprentice horologist under his father, Léonard-Fédéric Nardin and perfected his skills under the tutelage of Frédéric-William Dubois and Louis JeanRichard-dit-Bressel. Two master watchmakers who were experts in precision watches and whose fame extended beyond the mountains of Neuchâtel. Ulysse established his own workshop at the age of 23. Despite growing up in the Jura mountains, he was fascinated by the sea and therefore produced nautical timekeeping instruments. The number of employees in 1900 was an impressive 300. The company was taken over and re-invigorated in 1983 by Rolf W. Schnyder who transformed it into a profitable business. Since 2014, it has been a subsidiary of the French luxury group Kering. Ulysse Nardin has operated out of the same building headquartered in Le Locle since 1865.