English chronometer with 56h power reserve Circa 1850- 1900

Deck chonometer by Victor Kullberg
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A very fine English marine chronometer, circa 1850-1900. Spring detent chronometer movement, gold spring, helical hairspring. Silvered dial with Roman hours and outer minute divisions, subsidiary seconds, 56-hour power reserve indicator, and solid rose gold hands. Three-part mahogany box, brass case, gimbal suspension. The box and dial were signed and numbered, and the case and movement were with matching numbers. Comes with the original key.
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Dimensions: 18 × 18 × 18 cm
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Signed: Victor Kullberg 
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Victor Kullberg was born in Visby on the island of Gotland on August 13, 1824. Kullberg was the son of Johan Kullberg (1800-1876) and Hedvig Christina Ahlström (1801-1840), and from 1840 he was trained as a watchmaker by the local watch and chronometer manufacturer Victor Söderberg. His further professional training was completed in Copenhagen by Louis Urban Jürgensen, probably Scandinavia’s most famous watchmaker. At the age of 27, he travelled to the World Exhibition in London in 1851 and made contacts with other chronometer makers there. Then, in 1856, he opened his own factory on Liverpool Road 105. He produced marine chronometers and precision pocket watches. His outstanding achievements did not remain undiscovered. In 1874, he was appointed as the Court Watchmaker to the Swedish Royal House and awarded the Wasa medal.