Case & Design Inspired by Zenith's historic aviation watches, the Pilot Type 20 combines a substantial bronze case with classic pilot-watch aesthetics. The bronze naturally develops a unique patina over time, giving each watch its own individual character. * Case material: Bronze * Diameter: 45 mm * Thickness: 14.25 mm * Titanium caseback * Domed sapphire crystal with anti-reflective treatment * Water resistance: 100 metres Dial & Hands * Matte dark-blue dial * Large Arabic numerals * Super-LumiNova C1 luminous material * Gold-plated cathedral-style hands with luminous filling * Small seconds at 9 o'clock * 30-minute chronograph counter at 3 o'clock Central chronograph seconds hand Highlights * Legendary El Primero Movement: Powered by Zenith's renowned in-house El Primero Calibre 4069, one of the most celebrated high-frequency automatic chronograph movements in Swiss watchmaking history. * 45 mm Bronze Case: The bronze case naturally develops a unique patina over time, giving each watch an individual character and appearance highly appreciated by collectors. * Historic Aviation Heritage: The "Montre d'Aéronef" designation ("aircraft watch") pays tribute to Zenith's historic connection with aviation and its early production of pilot watches and cockpit instruments. * Premium Materials: Features a durable titanium caseback, reducing direct skin contact with the bronze, together with a highly scratch-resistant sapphire crystal protecting the dial.