Swedish silver verge watch with royal crown Circa 1771

Large watch decorated with a royal crown
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A large verge watch, made by the royal watchmaker Jacob Kock in Stockholm, Sweden, circa 1771. The silver case of this watch was likely made at a later date, specifically for the early and unusual movement, as evidenced by the Swedish hallmarks dating from the 19^th century. The original enamelled dial features an outer track with Arabic 5 minute numerals, Arabic numerals for the hours and gold hands. The numbered movement  is fitted with a verge escapement and decorated with royal crown as a reference to the royal watchmaker of Gustav III.
The dial and movement of this watch were probably made around 1771 and this watch comes with a Swedish silver key from the same period as the case.
The dial and movement are signed.
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Diameter: 53 mm
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Weight: 110 g
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Signed: Jac. Kock, Stockholm
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Kock
Jacob Kock (1737–1805) was a premier Swedish clockmaker of the Gustavian era, renowned for his role as the official Royal Court Clockmaker to King Gustav III. He was born in 1737 and descended from a lineage of craftsmen; his father, Johan Koch, was a “master of arts” who immigrated to Sweden from Berlin.

Kock was admitted as a clockmaker in 1762 and operated his workshop in Stockholm until his retirement in 1803. He ran one of the city’s most significant workshops, employing roughly ten people at its peak, including journeymen, apprentices and a specialist “maid who does the gilding”.