Unusual Swiss ivory cylinder pocket watch Circa 1860

Ivory watch with chatelaine key and seal en suite
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An unusual Swiss ivory pocket watch with integral ivory and turquoise set chatelaine with key and seal en suite, circa 1860. Accompanied by the original fitted box. Turned ivory, two turned pendants, the back secured by two screws, recessed shuttered apertures for the winding and hand setting. Chatelaine inlaid with cabochon turquoises, steel and ivory links, the upper panel engraved with a monogram LB. D. Small white enamel with radial Roman numerals, outer minute divisions and blued steel Breguet hands. A matte gilt movement, Lépine caliber, jewelled cylinder escapement, three arm balance, flat balance spring and an index regulator.
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Diameter: 42.5 mm
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Signed: No Name