The mechanism oscillates at a frequency of 36,000 vph (4Hz).For long, the name Chronomaster has been associated at Zenith with an El Primero-powered (what else…) classic chronograph, without an external bezel, often with tri-colour sub-dials and available either in 42mm or in an even more desirable, historically relevant 38mm diameter, inspired by the legendary A386 model of 1969. It includes a hacking seconds function for precision times setting, a lateral clutch, and a skeletonized rotor.

It's rhodium plated with fausses cotes embellishment and it's constructed with 35 jewels, 311 components, a shock absorber system, heat blued screws, and a monometallic balance. This Zenith El Primero Chronomaster 03.3200.3600/21.C903 has a mechanical automatic self-winding high frequency second generation El Primero caliber 3600 column wheel movement. It's water resistant to 50 meters/165 feet, it has a 60-hour power reserve at full winding, and the 13.7mm thick case, dial, and movement are all signed. There is a trapezoidal date aperture window between 4 and 5 o'clock.

The central luminous white chronograph hand makes one revolution every ten seconds and there are three overlapping recessed silver subsidiary dials with black Arabic numerals, markers, and blued indicator hands including a 60-minute counter at 6 o'clock, a 60-second register at 3 o'clock, and there is a constant running small seconds counter at 9 o'clock. The dial is black with recessed reverse silver Panda subsidiary dials, applied faceted luminous baton hour indices around an outer black/1/10th second scale, and there are skeletonized luminous baton hour and minute hands. The 38mm diameter round solid three-body case, gently curved lugs, and thin flat bezel, are polished. It has a screw-down signed winding crown, round 'pushrod' style chronograph push buttons, and there is a screw down exhibition sapphire display crystal case back engraved with 'CHRONOMASTER – EL PRIMERO – ZENITH MANUFACTURE – SWISS MADE,' and a serial number. It includes a leather strap with a stainless-steel deployment buckle and scratch resistant sapphire crystals (domed over the dial).

This is a stainless-steel Zenith Chronomaster El Primero 03.3200.3600/21.C903. More about Chronomaster El Primero Panda Dial

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