JEAN in RENNES 19th century 18K yellow gold and enamel collar watch with a matching 18K yellow gold and silver (800 thousandths) chatelaine for the keyboard, holding a lapis lazuli key and seal. CASE: round, translucent blue enamel reverse on guilloché background, centred with rose-cut diamonds, 18K gold bowl. DIAL: white enamel, painted Roman numeral and minute markers, blued steel 'Breguet' hands. MOVEMENT: cylinder escapement. Case signed. Numbered 6321. DIAMETER 28 mm. GROSS WEIGHT: 60.19 g. PROVENANCE: Family collection CONDITION REPORT ON REQUEST CONDITION REPORT ON REQUEST A XIXth century enamel and 18K yellow gold manual winding collar watch with chatelaine by Jean in Rennes.