Zenith El Primero Sport men's watch beats to the El Primero 400 B calibre at a rate of 36,000 vibrations per hour, guaranteeing 1/10th of a second precision and a 50-hour power reserve for the hour, minute, chronograph, date and small seconds functions. M

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Zenith El Primero Sport men's watch beats to the El Primero 400 B calibre at a rate of 36,000 vibrations per hour, guaranteeing 1/10th of a second precision and a 50-hour power reserve for the hour, minute, chronograph, date and small seconds functions. M

Zenith El Primero Sport men's watch beats to the El Primero 400 B calibre at a rate of 36,000 vibrations per hour, guaranteeing 1/10th of a second precision and a 50-hour power reserve for the hour, minute, chronograph, date and small seconds functions. Model shown here with a steel bracelet.

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