Baselworld 2017: Zenith CEO Jean-Claude Biver reveals the Defy El Primero 21,
an astonishing chronograph with a 100TH of second movement. A milestone.
The world’s most accurate series-made chronograph in 1969 enters the 21th century.
![](https://pressroom.zenith-watches.com/app/uploads/2017/12/34fcd72ff0897fbef2c991ce227c3a07.jpg)
Baselworld 2017: Zenith CEO Jean-Claude Biver reveals the Defy El Primero 21,
an astonishing chronograph with a 100TH of second movement. A milestone.
The world’s most accurate series-made chronograph in 1969 enters the 21th century.