The 45 mm-diameter steel case of the Zenith Chronomaster Sport houses the famous El Primero 400 B automatic chronograph movement, featuring an integrated column-wheel construction and beating at a cadence of 36,000 vibrations/hour. This model is water-resistant to 200 metres and equipped with a new black rubber strap coated with carbon fibre, the same material as certain parts of the Land Rover BAR Team boat.
