German silver full hunter historical pocket watch Circa 1853

Important chronometer with a spherical hairspring
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An historically important chronometer with a spherical hairspring, made by Carl Moritz Grossmann in Glashütte, Germany, circa 1853. The numbered typical Glashütte case is crafted from silver and features gold hinges, a screwed down crown and a cuvette inscribed with the name of the probable English retailer “Hunter & Co” in London. The enamel dial features an outer minutes and hours track with Roman hour numerals, a subsidiary seconds dial at 6 o’clock and steel hands. The numbered movement is equipped with a very early Glashütte chronometer escapement with gold wheels, a chronometer balance wheel, a bishop’s crook lever and an extremely rare spherical hairspring.
The dial is signed.
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Diameter: 53.5 mm
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Weight: 130 g
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Signed: M. Grossmann, Glashütte
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The item presented here is probably the earliest known pocket chronometer by Grossmann, either from the founding year of his Glashütte watch factory in 1854 or possibly even from the previous year 1853, which he spent in England.