73. Chrono-Micrometer. An 18K gold open face keyless wind chronograph pocket watch Chrono-Micrometer. Chronographe de poche à cadran ouvert en or jaune 18K (750) remontoir au pendant Date: Circa 1890 Movement: Gilt full plate, English lever, cut and compensated bi-metallic balance bridge, No.157025 Dial: White, black Roman numerals, black outer minute track, black outer 1/5th second divisions, subsidiary dial at 6 for running seconds, gilt spade hands, centre chronograph hand Case: Hinged round, 18K gold cuvette, engraving to back, chronograph button to pendant at 12 Size: 52mm Weight: 128,20g