Zenith Chronomaster

Every El Primero descends from an act of quiet defiance: in 1975, ordered to destroy the tooling for mechanical movements, a Zenith watchmaker hid it in an attic instead. The calibre survived, and the Chronomaster is its direct heir. At 41mm in steel, this reference runs a high-frequency automatic chronograph beating at 36,000 vibrations per hour, precise to a tenth of a second and visible through the sapphire caseback.

Reference: 03.3120.3600/76.M3100
Movement: Automatic chronograph, El Primero 3600, 5 Hz
Power reserve: approx. 60 hours
Case: Stainless steel, 41 mm
Water resistance: 50 m
Year: 2026 — Full set.