Zenith Chronomaster El Primero SS Skeleton Dial

Introduced in 2017, the Zenith Chronomaster El Primero Full Open ref. 03.2081.400/78.C813 is a modern expression of the manufacture's most important chronograph legacy. Its 42 mm stainless steel case frames a fully open-worked dial that puts the caliber El Primero 400 on display, turning the movement itself into the visual centerpiece of the watch. This is not a limited edition, nor was it made for a specific country or boutique, which makes its appeal rooted in design and mechanical significance rather than artificial scarcity. Collectors value this reference for how clearly it showcases the architecture of Zenith's high-frequency automatic chronograph, a direct descendant of the historic El Primero introduced in 1969. The caliber El Primero 400 beats at 36,000 vibrations per hour and uses a column-wheel chronograph layout, qualities that have long defined the line's reputation for precision and technical integrity. The open dial still preserves the signature tricolor register treatment that ties the watch back to the most recognizable Chronomaster executions. A date at 6 o'clock, sapphire display back, and black alligator strap with rubber lining give the watch everyday practicality without diluting its mechanical focus. Within the broader Chronomaster family, this reference stands out as one of the clearest demonstrations of Zenith's ability to balance heritage with contemporary presentation. For buyers who want an El Primero that places the movement front and center, this Full Open remains one of the most compelling discontinued steel references of its era. Like New with Zenith box and papers dated 2018.