Robert & Courvoisier, a silver open face quarter repeating pocket watch, no. 30765 30437, circa 1800, verge fusee quarter repeating movement, undersprung three armed balance, pierced and engraved balance cock, silvered disc regulator, no. 30437, silvered engine turned dial with foliate engraved border, Roman numerals, blued steel spade hands, silver four piece hinged case, the back cover with engine turned decoration and circular shaped vacant reserve, cuvette and movement signed, diameter 57mm