During Watches & Wonders, where Zenith’s “Master of Chronographs” exhibition highlights its milestones and trajectory in becoming the preeminent manufacture and innovator of automatic chronographs, Zenith unveils the latest generation of the Chronomaster Open with a tri-colour dial that inventively reveals its high-frequency beating heart. Revisiting the iconic tri-colour dial configuration that debuted with the iconic A386 in 1969 and which remains a distinctive and instantly recognizable El Primero design element, the latest iteration of the Chronomaster Open retains it entirely with a transparent twist. Instead of cutting out the small seconds counter at 9 o’clock entirely as was the case with the previous versions of the Chronomaster Open, the three counter colours are retained thanks to a hesalite crystal element that serves as a readable sub-dial while allowing a view of the silicon star-shaped escape wheel.