The Chronomaster Sport builds upon the El Primero platform, offering a new design that incorporates one of the most important watch movements ever made.

Zenith’s El Primero movement family retains its position as one of the most significant horological developments ever — full stop. Since its debut in 1969 as one of the first automatic chronograph movements in the world (hence its name), it has captured the hearts of watch lovers everywhere with its smooth, column wheel-controlled action, its high frequency of 36,000 vibrations per hour, and its classic tri-compax layout.
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