Zenith Defy El Primero 21 Ceramic — Openworked Dual-Counter Dial | Ref. 49.9000.9004/78.M9000

When Zenith set out to push the El Primero beyond its already extraordinary capabilities, the result was the El Primero 9004 — a movement that measures time not to 1/10th of a second, but to 1/100th. This 44 mm black ceramic Defy El Primero 21 is the physical embodiment of that ambition, housing a movement that oscillates at 360,000 vibrations per hour within a case material chosen for its absolute resistance to the daily battle against scratches, heat, and corrosion. Black ceramic's impenetrable surface is matched only by its depth of colour — a darkness that seems to absorb the world around it.

The openworked dial is a masterclass in technical transparency, its apertures revealing the dual-movement architecture at the heart of the El Primero 9004. Two different-coloured counters distinguish the timekeeping function from the chronograph, providing immediate visual clarity even at a glance. This is not merely decoration — it is function made beautiful, each counter serving a precise horological purpose within the most capable chronograph movement Zenith has ever produced. Power reserve reaches approximately 50 hours.

The matching ceramic bracelet extends the watch's monolithic black composition from case to clasp, creating a unified visual statement that is as uncompromising as the movement within. Water resistant to 10 ATM, the Defy El Primero 21 in black ceramic is the watch for those who do not merely follow time — they command it.