VACHERON & COSTANTIN, SILVER POCKET WATCH, SWISS CIRCA 1820 silver case diameter 43 mm, white enamel dial with Roman numerals, signed at 12 o'clock, gilded brass hand, smooth back, gilded back case, signed, bearing serial no. 45850, signed movement with verge escapement. Watch currently in working order, with modern winding key. VACHERON & COSTANTIN, SILVER OPEN FACE VERGE POCKET WATCH, SWITZERLAND CIRCA 1820