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 03.3100.3600/69.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. 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 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 03.3100.3600/69.M3100.

Download el primero 3600 movement