Danish gold quarter repeating cylinder pocket watch Circa 1820

Gold open faced repeater by Fredrik Jürgensen
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An early, rare and large Danish 18 carat rose gold open faced quarter repeating cylinder pocket watch, circa 1820.
Frosted fire gilt full plate movement, key wind, frosted, two hammers, two gongs, a cylinder escapement, three-arm brass balance.
The case back is engine-turned with polished bezels and a reeded band. A gilt dome. White enamel dial with Breguet numerals, an outer minute track and blued Breguet hands.
Cuvette signed and numbered, dial and movement signed.
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Diameter: 57 mm
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Weight: 150 g
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Signed: Fredrik Jürgensen Kiöbenhavn (Copenhagen)
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Fredrik Jürgensen (1785-1845) was the youngest son of Jürgen Jürgensen (1745-1811) and was born in Copenhagen into a dynasty of fine watchmakers. He apprenticed to his famous older brother Urban Jürgensen (1776-1830) in 1801, whom he worked with until 1809 in Le Locle, Switzerland, in April of that year he went to Geneva. In 1811 Fredrik was recalled to Copenhagen on his father’s death. On May 15th, 1811 he was appointed watchmaker to the court as the successor of his father. It is reported Jürgensen made only around 500 pocket watches between 1811 and 1843, typically with a double-wheel duplex escapement, but also with a large steel cylinder escapement.