Self-winding mechanical movement Calibre El Primero 400 with approximately 50 hours power reserve, 31 jewels, and 36,000 vibrations/hour. The High Frequency (36,000 A/h) allows the central chronograph seconds hand to advance incredibly continuously and smoothly, dividing time with mechanical precision to the tenth of a second. Chronograph with column wheel, hours, minutes, small seconds, and date.

Round steel case with a diameter of 38 mm, with the same proportions as the legendary A386 model from 1969, famous as the first high-frequency automatic chronograph in history. Water-resistant to 5 atmospheres.

Silver dial with 'sunray' finish. The three chronograph counters slightly overlap and display three different shades: matte blue for the chronograph minutes, dark grey for the chronograph hours, and light grey for the continuous seconds. Date window positioned diagonally between 4 and 5 o'clock, maintaining the symmetry of the counters.

Sapphire crystal

Steel case back with screw closure and visible Zenith El Primero movement with a skeletonized bi-directional winding rotor featuring the classic Zenith star.

Non-original leather strap with original Zenith steel deployant clasp.