Rare Danish repeater with double wheel duplex escapement Circa 1820

Gold pocket watch by Fredrik Jürgensen
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A very fine and rare Danish 18 carat gold open faced quarter repeating gentleman’s pocket watch, circa 1820. Full plate movement, key wind, double wheel duplex escapement, chain and fusee, two hammers, two gongs, bimetallic temperature compensated balance spring, three-arm brass balance.
The case is engine-turned with polished bezels, a reeded band, a pusher for quarter repetition through the pendant, a slider in the band serves as a kind of safety device to prevent the repetition from being activated accidentally.
White enamel dial with Arabic numerals, an outer minute track and blued steel Breguet hands. Dial and movement signed, cuvette signed and numbered.
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Diameter: 57 mm
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Weight: 168 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.
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Reference 0037500