The Zenith Defy Classic Chronograph Aero, reference number 03.0526.4000/21, is a striking (and sturdy) watch that combines the precision of the El Primero caliber with a striking and distinctive design. The Defy Classic Chronograph Aero is an impressive model that effortlessly combines technology and style. The 46mm stainless steel case houses the famous automatic "El Primero" movement, one of the most accurate mechanical chronographs ever made, with a high frequency of 36,000 beats per hour. This 2009 watch comes in a beautiful full set, including a new, full service and extra rubber Zenith strap. This high-quality chronograph is internally equipped with the world-famous Zenith "El Primero" Cal. 4000 automatic movement. This movement, which was also used in early Rolex Daytonas, has an absolute top status in the Swiss watch industry. This beautiful movement runs perfectly and is visible through the transparent caseback. The movement runs excellently and is very accurate! We measure excellent power and accuracy, which is logical after a complete overhaul/service. This watch comes on a sturdy stainless steel Zenith bracelet. This solid steel bracelet beautifully balances the watch. The bracelet fits wrists up to approximately 20cm. It also comes with a high-quality Zenith rubber strap, allowing you to wear the watch on wrists up to approximately 22cm. This watch comes as a beautiful full set from 2009, including: a luxury Zenith box, outer box, Zenith warranty card, extra rubber strap, two extra links, a service invoice from 2025, and an in-house warranty report with a 1-year warranty.