Chronomaster El Primero

The Zenith Chronomaster Grande Date Full Open, reference 03.2530.4047/78.C813, is a technically sophisticated chronograph that showcases the brand’s iconic El Primero architecture through a striking openworked display. Combining high-frequency performance with bold contemporary styling, this certified pre-owned luxury watch is presented in very good condition and supplied with its original box and papers.

The watch features a substantial 45 mm stainless steel case, offering strong wrist presence and refined finishing. The skeletonised dial reveals the intricate chronograph mechanism, delivering depth and visual dynamism while maintaining clear legibility. The large double-window date display at 2 o’clock enhances practicality and reinforces the model’s distinctive character. Luminous hands and applied hour markers ensure optimal readability in all lighting conditions.

Powering the watch is the Zenith El Primero Calibre 4047 automatic chronograph movement. Operating at a high frequency of 36,000 vibrations per hour (5 Hz), this in-house calibre ensures exceptional precision and smooth chronograph operation. It provides a power reserve of approximately 50 hours and reflects Zenith’s long-standing expertise in high-beat chronometry.

The watch is fitted with a high-quality leather strap that complements the stainless steel case and enhances its sporty yet refined aesthetic.

In very good overall condition, the case and strap show only light signs of wear consistent with careful ownership. Accompanied by its original box and papers, this pre-owned luxury watch represents an excellent opportunity to acquire the Zenith Chronomaster Grande Date Full Open 03.2530.4047/78.C813, combining openworked design, technical sophistication, and Swiss manufacture excellence.