French 20K gold quarter repeating pocket watch Circa 1806-1809

Gold open faced cylinder watch by Basile-Charles Le Roy
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A fine, French gold quarter repeating key-winding pocket watch, Circa 1806-1809.
Round-shaped 20K yellow gold guilloché (engine-turned) case. Inside case back engraved in taille-douce (fine cut) Fanny H. Caulfield / Montre de son père. Gilded brass movement, going barrel, cylinder escapement, monometallic balance (gilded brass) and blued steel flat hairspring, upper pivot with diamond end-stone and polished steel index regulator, one horological complication: Quarter-repeater on two steel square gongs (activated by depressing the pendant). Gold guilloché (engine-turned) dial with Roman radial hours, outer minutes track, and Breguet-style original hands. Dial and cuvette (dome) signed.
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Diameter: 57 mm
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Signed: Le Roy, Paris
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Roy, Charles (1765-1839), Paris
Basile-Charles Le Roy (1765-1839) was the founder of the Le Roy company in 1785 in Paris (13-15 Galerie Montpensier, Palais-Royal).
He was appointed circa 1806, Horloger de S. A. I. & R., Madame, Mère de l’Empereur et Roi (Clockmaker of His Imperial and Royal Highness Madame, Mother of the Emperor and King), Lætitia Bonaparte (1750-1836), mother of Napoléon Bonaparte (1769-1821), Emperor of the French (1804-1814 and 1815).
Circa 1810, he became Horloger de S. M. le Roi de Westphalie (Clockmaker of His Majesty the King of Westphalia), Jérôme Bonaparte (1784-1860), King of Westphalia (1807-1813), youngest brother of Napoléon Ist.
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Caulfield, Fanny H., London
Fanny H. Caulfield was the eldest daughter of the late St. George Caulfield, Esq. She married, in July 1827, at Col. Cuff’s, Whitehall-place, London, Fred. Hamilton Cornewall, Esq., eldest son of the bishop of Worcester.