The Zenith El Primero Perpetual Calendar 18.2180.4003/01.C713 is encased in 42mm of rose gold surrounding a silver dial on a brown rubber lined alligator leather strap with rose gold deployment clasp. Functions include hours, minutes, seconds, chronograph, perpetual calendar, and moonphase.

This Zenith Chronometer Perpetual Calendar chronograph includes a dial with silver sunburst pattern and four sub dials. Chronograph minutes, seconds, and hours exist alongside the day, date, month, and current moon phase. The leap year cycle can be read on the 48-month display at 12 o'clock.

This Zenith El Primero Perpetual Calendar 18.2180.4003/01.C713 is a 50 piece limited edition. Its Zenith El Primero caliber 4003 is an automatic movement, in house caliber, and boasts as power reserve of 52 hours. The movement features a column wheel chronograph action and a beat rate of 36,000 VpH. The caliber 4003 includes a Zenith perpetual calendar that can account for leap years, irregular length months, and 122 years of moon phase changes. The watch features 100-meter water resistance.

The watch also measures 15.3mm in thickness and 50mm from lug-to-lug.

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