The company was started in 1865 by Georges Favre-Jacot at the age of 22, in Le Locle in the canton of Neuchâtel. Zenith was purchased by LVMH in November 1999, Zenith is one of the Swiss watch manufacturers that still produce their own movements in-house. The El Primero calibre, which was first released in 1969 and is still produced today, was one of the first automatic chronograph movements and has a frequency of 36,000 alternations per hour (5 Hz). This high rate allows a resolution of 1⁄10 of a second and a potential for greater positional accuracy over the more common standard frequency of 28,800 alternations per hour (4 Hz).
Few years ago the famous Rolex ‘Daytona’ used to house a Zenith based movement.