The Zenith El Primero range is one of the most famous chronograph watches in the world. A movement that is so good Even Rolex used it. Developed in 1962 by over 200 experts experimenting with 18 types of metal it finally made pre production in 1965. Running at 36000 VPH it was launched in 1969. It takes 9 months to make an el primero movement and it performs 10 jumps per second. There are 23 different versions available truly demonstrating the awesome creativity Zenith has.