Danish double wheel duplex escapement watch Circa 1835

Silver open faced pocket watch by Urban Jürgensen & Sönner
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An extremely rare, early Danish gentleman’s pocket watch with double wheel duplex escapement and temperature compensated balance spring, circa 1835. The watch has an original silver case punched TI 5 and a dome signed and numbered Urban Jürgensen Sönner No.710. It features an extremely rare keywind, frosted gilt full plate movement with a steel/brass double wheel duplex escapement, temperature compensation, and gilt brass ring balance. The original enamel dial is signed and has Roman radial hours, an outer minutes track with Arabic five-minute numerals, steel hands, and a subsidiary dial with seconds for observation purposes.
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Diameter: 56 mm
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Weight: 149 g
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Signed: Urban Jürgensen, Kobenhavn
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The watch numbered 710 is of historical significance as it is one of the final watches produced by Urban Jürgensen. It was sold under the new company name Urban Jürgensens Sönner. This period in history relates to watches with numbers 689-728 manufactured in the year 1830.
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Urban Jürgensen, the eldest son of the court watchmaker Jürgen Jürgensen in Copenhagen, was born on August 5, 1776, in Denmark. At a young age, he exhibited a talent for art and science and was proficient in Danish, French, English, and German. At the age of 16, he began his apprenticeship with his father and learned the various aspects of watchmaking. After completing his training, he went to Le Locle (Switzerland) in 1797 to work for Jacques-Frédéric Houriet. He later moved to Paris and worked for Ferdinand Berthoud and Abraham Louis Breguet, where he established connections with these renowned masters. With Ferdinand Berthoud’s advice, he went to John Arnold in London to refine his knowledge of constructing marine chronometers. He developed a unique chronometer escapement with two escapement wheels.