The Zenith Defy El Primero 21 is a striking example of modern haute horlogerie, combining avant-garde design with one of the most advanced chronograph movements ever produced. With its lightweight 44mm titanium case and openwork skeleton dial, this timepiece offers exceptional performance, transparency, and an unmistakably modern look. At the heart of the watch is the El Primero Caliber 9004, a revolutionary high-frequency chronograph that can measure time to 1/100th of a second (the central chronograph hand rotates very quickly at 1x per second), setting a new benchmark in mechanical watchmaking. This beautiful movement runs perfectly and is visible through the transparent caseback. The movement runs excellently and is very accurate! The El Primero 9004 features two independent escapements: one for the time display (36,000 vibrations per hour) and one for the chronograph (360,000 vibrations per hour). This innovative architecture allows the central chronograph hand to make one full rotation per second, resulting in unprecedented precision for a fully mechanical wristwatch. This watch comes on the beautiful hybrid (leather/rubber) Zenith strap. The strap fits wrists of up to approximately 21cm. The strap is in excellent condition.