The Zenith El Primero Lightweight is a special version of their popular El Primero chronograph watch. Limited to only 100 pieces, it's been given a lightweight makeover. The movement, called the caliber 400B Titanium, has been carefully crafted with titanium parts, reducing the weight by 25% to a mere 15.9 grams. The case is made from a mix of ceramicised aluminum and carbon, and the pushers and crown are titanium. The dial is a unique openworked design with three different-colored counters. This