Courvoisier Fils, a silver open face alarm pocket watch, no. 3607 43147, circa 1800, verge fusee alarm movement, three armed undersprung balance, pierced and engraved bridge balance cock, polished steel endpiece, white enamel dial, Arabic numerals, blued steel Breguet hands, centre alarm hand, winding apertures at 11 and 5 o'clock, three piece hinged case, the back cover with engine turned decoration and circular shaped vacant reserve, dial and movement signed, diameter 52mm