Zenith 3600

The Zenith caliber 3600 is an automatic movement introduced in 2019 as a 50th anniversary update to the El Primero lineage. It operates at 36,000 vph and delivers a 60-hour power reserve, an improvement over the earlier 50-hour specification. The movement features a hacking seconds function and incorporates a redesigned gear train and escapement. It powers Chronomaster models and remains in production.