Zenith El Primero Chronomaster

This Chronomaster in steel at 37mm keeps the El Primero architecture that started the line — the first automatic chronograph movement to reach market, in 1969, beating at 5 Hz when the rest of the industry ran at half that frequency. The tri-register dial and stepped bezel identify it as the direct descendant of the original A386.

Reference: 03.A384.400/385.M385
Movement: El Primero automatic chronograph, 5 Hz
Power reserve: approx. 50 hours
Case: Stainless steel, 37 mm
Water resistance: 100 m
Year: 2026 — Full set