Rare Danish silver open faced cylinder pocket watch Circa 1803

Silver precision watch by Larpent & Jürgensen
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A rare silver plain open faced watch made by Larpent & Jürgensen in Roskilde, Denmark, circa 1803. The high quality case is crafted from silver and is hinged to both sides. The white enamel face has a dial in the upper half, indicating the time with Arabic five minute and Roman hour numerals and gold hands and in the lower half a dial for the seconds with Arabic 15 seconds numerals and a black hand. The extremely rare movement with decentral dial and large seconds indication for observation purposes has a large barrel and a cylinder escapement.
Dial and movement signed.
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Diameter: 57 mm
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Weight: 138 g
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Signed: Larpent & Jürgensen                
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Jürgensen Dynasty
Jürgen Jürgensen (1745 -1811): Jürgen Jürgensen was born in Copenhagen in 1745. Between 1759 and 1765 he worked as an apprentice for Johnas Jacob Lincke. In 1768, Jürgen Jürgensen moved to Le Locle and worked with Jacques-Frédéric Houriet, the famous Swiss watchmaker who was known as the father of Swiss chronometry. He founded a watch factory in Copenhagen in 1775 and formed the brand name Larpent & Jürgensen in the 1780s in collaboration with Isaac Larpent, a well known Danish watchmaker. In 1781, Larpent & Jürgensen began producing pocket watches. In 1784, King Fredrik VI appointed Jürgen Jürgensen as Court Watchmaker.