


The El Primero 3600 is an “entirely redesigned movement” that’s based on the original but upgraded in construction and function.

While the original movement is a landmark, it is half a century old. The Striking 10th returnsīut arguably the most significant watch of all is the Chronomaster 2 El Primero, powered by the El Primero 3600. It’s in a 44mm brushed titanium case with a partially open-worked dial to reveal some of the chronograph mechanism. The El Primero 9004 inside has twin escapements, one running at 36,000 beats per hour for the time, and the other running at 360,000 beats per hour for the 1/100th of a second chronograph. In contrast the Defy El Primero 21 takes the movement to a new level. From left: the A386 remake, Chronomaster 2, and the Defy
