The Zenith El Primero Chronomaster Sport 03.3100.3600/21.M3100 was introduced in 2021. The mechanism oscillates at a frequency of 36,000 vph (4Hz). 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 Sport 03.3100.3600/21.M3100 has a mechanical high frequency second generation El Primero caliber 3600 column wheel movement. It's water resistant to 100 meters/330 feet, it has a 60-hour power reserve at full winding, and the 13.60mm thick case, dial, and movement are all signed. There is a quick set date aperture window between 4 and 5 o'clock, and it has a Certified Official Superlative Chronometer (COSC) rating. Equipped with the latest generation of the El Primero chronograph calibre capable of measuring and displaying 1/10th of a second measurements, this latest reference is crafted in gleaming rose gold and black ceramic. It has three raised overlapping subsidiary dials with concentric circle guilloche and black indicator hands, including a silver small running constant seconds register at 9 o'clock, a grey 60-minute chronograph totalizer at 6 o'clock, and there is a blue 60-second register at the 3 o'clock position. The Chronomaster Sport is the culmination of over 50 years of mastery of the sporty chronograph and the automatic chronograph calibre. The dial is white with applied faceted luminous rhodium plated rectangular hour markers surrounded by a perimeter black minute/1/5 second scale, pointed steel luminous baton hour and minute hands, and a steel sweep foudroyant flying seconds second hand with a red needle tip and a skeletonized Zenith star counterbalance that makes a full rotation in 10 seconds ("Striking Tenth"). The 41mm barrel-shaped solid three-body case, gently curved lugs, bracelet, and flat ceramic black fixed decimal bezel with a white Arabic numeral 1/10th of a second scale, are satin/polished. It has a pull- out signed winding crown, round fluted pump-style chronograph push buttons, and there is an exhibition sapphire display crystal case back secured with 4 screws and engraved with "CHRONOMASTER – 100M – 03.3100.3600," and a serial number. It includes an integral screwed stainless-steel link bracelet with a folding deployment buckle and domed scratch resistant sapphire crystals. This is a stainless-steel Zenith El Primero Chronomaster Sport 03.3100.3600/21.M3100. More about El Primero Chronomaster Sport 41mm Black Dial 2021
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