ZENITH. CHRONOMASTER EL PRIMERO. REF. 30.0240.410. CIRCA 2000. 18k (750 thousandths) yellow gold wristwatch on leather with flyback chronograph, triple date and moon phases. Round, stepped case, sapphire back, screw closure, two correctors on the case middle. White dial, applied hour markers, minute track graduated to 1/5th of a second, external tachometric scale, day of the week, month and date in windows, three counters and moon phases, dauphine hands. Automatic movement, cal. 410Z, chronometer-certified, N° 139429. Leather strap with yellow gold pin buckle, signed Zenith. Dial, case and movement signed. Numbered 15190. (Operation not guaranteed.) Diameter: 40 mm; Gross weight: 90.2 g. With: case, instructions for use and Cosc certificate, corrector. For this lot, SC E & S PORTIER is assisted by Géraldine Richard, SFEP expert.