Zenith El Primero Chronomaster Triple Calendar Moonphase Ref. (17.0240.410/01) - Circa 1990s-2000s

An exceptional and highly prestigious 18K rose gold automatic triple calendar chronograph wristwatch with a high-frequency movement, featuring an elegant silver guilloché dial and a detailed moon phase display. Presented in brand-new, unworn condition as a complete full set. 

Widely celebrated as a pinnacle of neoclassical horology, the Reference 17.0240.410/01 flawlessly unites high-frequency athletic engineering with traditional grand complications. At the beating heart of this mechanical masterpiece is the legendary in-house Calibre 410 automatic movement. Operating at an astonishing frequency of 36,000 vibrations per hour (5Hz), it features a sophisticated column-wheel mechanism and a lateral clutch system, cementing its position as one of the most historically significant chronograph calibres ever produced. 

This specific lot is distinguished by its pristine silver dial, adorned with sophisticated guilloché finishes, applied rose gold Roman numerals, and elegant Dauphine hands. The masterfully integrated triple calendar layout seamlessly presents apertures for the day of the week at 10 o'clock, the month at 2 o'clock, and a discrete date window between 4 and 5 o'clock. This is balanced beautifully by an intricate moon phase indicator nested within the 6 o'clock chronograph register. Enclosed in a perfectly proportioned 39.5mm 18K rose gold case featuring stepped bezels, the timepiece boasts a sapphire crystal display case back that reveals the high-beat, meticulously finished movement. The watch is fitted to its original premium brown leather strap and secured by its matching Zenith 18K rose gold clasp. 

A definitive masterpiece for collectors seeking a landmark complication that captures Zenith’s unmatched mechanical heritage and timeless luxury. Offered at Maynard Auctions in pristine, unworn condition accompanied by its original box and papers. 

• Model: El Primero Chronomaster Triple Calendar Moonphase
• Reference: 17.0240.410/01
• Case Material: 18K Rose Gold
• Case Diameter: 39.5mm
• Dial: Silver Guilloché with Rose Gold Roman Numerals & Faceted Hands
• Movement: Automatic High-Frequency, Zenith Manufakturkaliber 410 (36,000 vph)
• Power Reserve: Approx. 52 Hours
• Functions: Column-Wheel Chronograph, Triple Calendar (Day, Date, Month), Moon Phase, Hours, Minutes, Small Seconds
• Bracelet: Zenith Genuine Brown Leather Strap with 18K Rose Gold Clasp
• Glass: Scratch-resistant Sapphire Crystal (Front and Case Back)
• Condition: Brand New / Unworn (New Old Stock)
• Accompaniments: Full Set (Original Box, Stamped Warranty Papers, Bulletins/Manuals)