Zenith 03.0510.4100/22.C492.GB Class T Moon El Primero Black Dial (25330)
25330 Zenith Class T Moonphase El Primero 03-0510-410022C492GB, 03.0510.4100/22.C492.GB, stainless steel on a strap with a stainless steel double-foldover buckle, automatic el primero movement (Caliber 4100), chronograph function with minute counter at 3, small seconds at 9, month, day, date between 4 and 5, black dial with applied silver numerals and stick markers, display back, sapphire crystal, diameter: 40mm, thickness: 14.25mm, water resistant to 50 meters, Like New with box and papers.$4,800
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More about Zenith 03.0510.4100/22.C492.GB 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).