SJX Watches
Hands-On: Zenith Defy El Primero Double Tourbillon
When Zenith unveiled the El Primero Defy 21 two years ago, it was a breakthrough for the brand, offering a 1/100th of a second chronograph with twin regulators for an affordable US$10,000 or so. This year the brand has kicked things up a notch with the El Primero Defy Double tourbillon, which essentially replaces the regular escapements with two tourbillons – one conventional and the other ultra-fast. The high-frequency evolution The new double tourbillon chronograph is a logical evolution of the classic El Primero – albeit accomplished with some help from TAG Heuer – that remained unchanged for decades. Unveiled 50 years ago, the El Primero was the first integrated automatic chronograph, and crucially, the first serially-produced, high-frequency chronograph running at 36,000 beats per hour (bph), allowing it to measure time down to the nearest tenth of a second. It would take 48 years for it to evolve into its first major iteration, the El Primero Defy 21 of 2017, which took the high-precision chronograph to its extreme with a monstrously high frequency of 50Hz, capable of measuring time down to a hundredth of a second. The Defy El Primero 21 launched in 2017 – an exotic chronograph for a basic price While it is true that a higher frequency regulator results in a higher resolution chronograph, it comes at a cost. An ultra-high frequency escapement requires tremendous energy, and the friction generated by the rapid motion of its components in turn mean more f...
