Zenith Class T Moon El Primero Black Dial

More about Class T Moon El Primero Black Dial

This is a stainless steel Zenith Class T Moon phase El Primero 03-0510-4100/22.C492.GB. It has a leather strap with a stainless steel double-foldover buckle, and a scratch resistant sapphire crystal. There is a pull out winding crown, and two rectangular chronograph pushbuttons. It has an exhibition sapphire display case back that's secured with 8 screws; around the polished perimeter is engraved "ZENITH CLASS – WATER RESISTANT 50M -03.0510.4100 – STAINLESS STEEL SWISS MADE." The 40mm diameter solid three-body case, downturned lugs, and angled bezel are polished/satin brushed. The dial is black with a guilloche clous de Paris textured circle and applied silver Arabic numeral hour markers and dart indices around a plain reserve. It has polished steel baton hands, a center chronograph sweep seconds hand with a balance, and there is an outer minute/second scale with perimeter one-fifth second divisions. It has a steel-rimmed date aperture window between 4 and 5 o'clock, and steel rimmed twin rectangular day and month windows underneath 12 o'clock. There are three subsidiary dials, including a running seconds register at 9 o'clock, a moon phase dial at 6 o'clock combined with a 12-hour totalizer, and a 30-minute chronograph totalizer at 3 o'clock. There is a power reserve of 55-hours at full wind, and it's water resistant to 50 meters/165 feet. It has a Certified Official Superlative Chronometer (COSC), and the 14.25mm thick case, dial, and movement are all signed. This Zenith Class T Moon phase El Primero 03.0510.4100/22.C492.GB has a mechanical automatic self-winding El Primero caliber 4100 movement. It's rhodium plated with fausses cotes embellishment, and it has a guilloche textured oscillator segment. It's constructed with 31 jewels, a straight-line lever escapement, and a shock absorber device. It includes a self-compensating free-sprung balance spring, and the mechanism oscillates at a frequency of 36,000 vph (5Hz).

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