Zenith Defy El Primero 21, a 100th-second chronograph
The Defy El Primero 21 by Zenith was undoubtedly one of the highlights of Baselworld 2017. With its chronograph seconds hand flashing around the dial once a second, and its movement that ensures timekeeping precision by means of two gear chains and two regulators, one for time and one for the chronograph, it is a…