Zenith Annual Calendar

Zenith's new Captain Winsor Annual Calendar brings together two notable watchmaking achievements: the elegantly simple annual calendar complication designed by Ludwig Oechslin, curator of the Musée International d’Horlogerie (MIH), and Zenith's famous 36,000 vph in-house El Primero chronograph. This piece marks the start of a collaboration between the MIH and the Manufacture Zenith. The movement begins with Zenith's El Primero automatic chronograph movement, produced by the manufacture in-house for more than 40 years. The El Primero is the only series-produced movement to beat at 36,000 vibrations per hour, meaning the chronograph can time events to the nearest 1/10 of a second. Zenith reserves this automatic caliber for its own timepieces. The 42mm Captain Winsor model is equipped with the automatic El Primero caliber 4054 version with central chronograph seconds, continuous seconds at 9 o'clock and a 60 minute totalizer at 6 o'clock. The movement is decorated with côtes de genève and circular-graining, and visible through the sapphire crystal case-back. To this caliber Zenith adds Oechslin's ingenious complication which displays the day of the week, date and month and that requires only one adjustment per year. To ensure excellent readability, this display is provided by three concentric discs. The outer disc shows the date, the middle one the month, and the inner one the day of the week. This mechanism is both simple and complex: for 31-day months, the date disc moves the month disc forward; for 30-day months, the month disc makes the 31 “jump”. The minimalist design of this complication comprises just nine moving parts, whereas most calendars require between 30 and 40. The Captain Winsor Annual Calendar Chronograph is available in stainless steel on strap priced at a very reasonable $8700, and in rose gold on strap priced at $18,800. Complete technical information appears below the images, which may be enlarged with a click.

Technical Characteristics Movement El Primero 4054, automatic Calibre: 13¼ ``` (diameter: 30 mm) Thickness: 8.30 mm Components: 341 Jewels: 29 Frequency: 36,000 Vph – (5 hz) Power reserve: 50 hours Finishing: oscillating weight with côtes de genève pattern. Functions Central hour and minute hands Small seconds at 9 o’clock Day and month at 3 o’clock Date indicator at 6 o’clock Chronograph: – 60-minute counter at 6 o’clock – Central chronograph hand Case, Dial & Hands Material: stainless steel or 18-carat rose gold Case diameter: 42 mm Dial opening diameter: 35.60 mm Crystal: box-shaped sapphire crystal with anti-reflection treatment on both sides Case-back: transparent sapphire crystal Water-resistance: 5 ATM Dial: silver-toned guilloché center / silver-toned circular satin-brushed exterior Indexes: facetted, rhodiumed and gold-plated Hands: facetted, rhodiumed and gold-plated Straps & Buckles Black or brown alligator strap with protective rubber lining Rose gold or stainless steel pin buckle