The Zenith Chronomaster Open reference 03.3300.3604/51.M3300 was introduced in 2022. This new take on Zenith’s El Primero Open features a case of 39.50mm, paired with a Blue dial with the signature tricolor sub dials. Inside ticks the El Primero 3604, a modified version of the El Primero 3600. This version is exclusively available through Zenith boutiques.
