Unusual German pocket watch with lever escapement Circa 1820

Gentleman’s watch with steel escape wheel by Jean A. Philippi
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An unusual, German gentleman’s pocket watch with lever escapement according to Emery, steel escape wheel and steel lever with ruby palettes, circa 1820.
18 Carat rose gold engine-turned case with reeded band, seconds stop lever, and case maker’s punch mark IE. Signed enamel dial with Arabic numerals, auxiliary seconds, and blued Breguet hands. Y-shaped bridge movement, keywind, frosted and gilt, with going barrel, three-arm ring balance, and temperature-compensating balance spring.
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Diameter: 53 mm
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Weight: 129 g
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Signed: Jean A. Philippi à Hambourg
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Jean A. Philippi, watchmaker in Hamburg and London
Johann A. Philippi was a watchmaker in Hamburg around 1820 and possibly also in London beforehand. Philippi was mentioned as a mechanic and businessman in the book “Der Hamburger Spritzenmeister und Mechaniker Johann Georg Repsold (1770-1830) by Jürgen W. Koch, and in the” The correspondence between Johann Caspar Horner and Johann Georg Repsold “also by Jürgen W. Koch Philippi was mentioned in connection with two chronometers and supplied instruments.

Johann Philippi family was made possible by the publicist and royal Prussian court counsellor Johann Jacob Martin Philippi and Jacob Martin Philippi, a German Protestant theologian, founder and rector of the high school in Solingen which was born in Hamburg.

He signed his watches with Jean A. Philippi à Hambourg, the French language was very common in the upper echelons and at the court.