Jaqs. Coulin & Amy Bry，多色金，精細琺瑯彩繪，獨特日、月、星期三曆，中心秒針，玻璃外殼，手動上弦懷錶

FINE MULTICOLORED GOLD, PAINTED ENAMEL MANUALLY-WOUND PAIR CASED POCKET WATCH WITH UNUSUAL TRIPLE CALENDAR, SWEEP CENTRE SECONDS AND GLAZED OUTER CASE, MOVEMENT NO. 4892, CIRCA 1790