German silver ray skin covered verge pocket watch Circa 1800

Open faced pocket watch by Louis Preudhomme
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A German pair cased verge pocket watch, circa 1800.
Brass silver outer case, coated with ray skin, decoration studs. Silver inner case, engraved back side, case maker’s punch mark RB. White enamel dial, signed L. Preudhomme à Berlin, Roman numerals for the hours, Arabic numerals for the minutes, decorative hands. Full plate movement, chain/fusee, three arm brass balance.
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Diameter: 55 mm
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Weight: 119 g
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Signed: Louis Preudhomme à Berlin
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Preudhomme is first mentioned in connection with Roentgen’s workshop in 1776. A small watch by David Roentgen (1743-1807) in the David collection in Kopenhagen is also signed by Preudhomme, who worked with a certain Raymond. The Metropolitan Museum of Art owns a table clock by David Roentgen that is fitted with a movement by Elié Preudhomme.