This is a new and unworn watch Bridging the past and present, the Chronomaster collection embodies the brands mastery of automatic, high frequency chronograph movement and the unique design language established over the course of 50 years. The Chronomaster Open exposes the beating heart of the El Primero movement in an unexpected way. Revealing the iconic movement hard at work within, this striking model features an open base plate and bridges, as well as an escape wheel and pallet lever crafted in lubricant-free silicone. Housed within a sleek 39.5mm steel case, the matte black dial makes a bold statement with three counters in varying metallic tones - a 60-minute counter at 6 oclock, 60-second counter at 3 oclock, and transparent counter for the running seconds. This high performance timepiece is accurate to 1/10th of a second and offers a 60-hour power reserve. A black cordura-effect rubber strap adds to the sleek, contemporary aesthetic.