The Zenith Chronomaster Open watch, also known as reference 03.3300.3604/51.M3300, made its debut in 2022. This updated version of the El Primero Open boasts a 39.50mm case and a striking Blue dial adorned with Zenith's signature tricolor sub dials. Under the hood, you'll find the El Primero 3604 movement, a tweaked version of the renowned El Primero 3600. And here's a little secret - this exclusive timepiece