Zenith Chronomaster El Primero A3817 Steel 37mm White Dial 03.A384.400/3817.M3817 - BRAND NEW

The Zenith Chronomaster El Primero reference 03.A384.400/3817.M3817 represents one of the most storied names in mechanical timekeeping — a watch that carries the legacy of the El Primero, widely recognized as one of the world's first automatic high-frequency chronograph movements, introduced by Zenith in 1969. The Chronomaster line was created to celebrate and perpetuate this achievement, and every reference bearing the El Primero name is a direct heir to that landmark horological moment. Owning a Chronomaster is owning a piece of watchmaking history that has influenced the industry for more than five decades.

This particular reference, the A3817, arrives in a 37mm stainless steel case — a diameter that consciously references the proportions of the original El Primero models of the late 1960s and early 1970s. At a time when many sport and dress chronographs have grown to 40mm and beyond, 37mm offers a refined, versatile fit that works equally well on smaller wrists and on those who prefer a more classic, unobtrusive profile on the cuff. The case, bezel, and integrated steel bracelet are all rendered in polished and brushed stainless steel, lending the watch a cohesive, elegant look that transitions seamlessly from boardroom to weekend.

The dial is finished in white with index hour markers, delivering exceptional legibility against a clean, uncluttered backdrop. White dials have long been prized by collectors for their timeless versatility — they pair naturally with virtually any strap or bracelet and read clearly under a broad range of lighting conditions. The index markers provide a dressy, contemporary look that distinguishes this reference from the more colorful tri-color subdial configurations associated with vintage El Primero chronographs, making the A3817 an excellent choice for those who prefer understated sophistication.

At the heart of the Chronomaster El Primero beats a movement from Zenith's celebrated El Primero family, a caliber renowned for its high-frequency oscillation that enables the chronograph to measure time with exceptional precision. Zenith has produced and continually refined the El Primero movement in-house for over fifty years, and its architecture remains a benchmark for mechanical chronograph engineering. The movement's pedigree is part of what makes every Chronomaster El Primero not simply a luxury timepiece but a genuine horological instrument.

This reference 03.A384.400/3817.M3817 is offered brand new, meaning it arrives in pristine, unworn condition direct from authorized inventory. For the discerning buyer, a brand-new example eliminates any concerns about prior wear, service history, or dial condition — you receive the watch exactly as Zenith intended it to leave the manufacture. At Bizak & Co., we specialize in sourcing new and pre-owned luxury watches at competitive prices, and our team is ready to answer any questions, provide additional images, or assist with purchase. Contact us today to buy the Zenith Chronomaster El Primero A3817 online or in person and experience the Bizak difference.