World’s Most Complex Wristwatch Revealed

​Vacheron Constantin, the esteemed Swiss watchmaker, has once again redefined horological excellence with the unveiling of the Les Cabinotiers "Berkley Grand Complication." This extraordinary timepiece, introduced at Watches and Wonders 2024, now holds the title of the world's most complicated watch, boasting an unprecedented 63 complications. ​

A New Pinnacle in Watchmaking

The "Berkley Grand Complication" surpasses Vacheron Constantin's previous record-holder, the Reference 57260, which featured 57 complications. This new masterpiece comprises 2,877 individual components and 245 jewels, all meticulously assembled into an 18k white gold case weighing approximately 960 grams (over two pounds). ​

Commissioned by a Passionate Collector

This horological marvel was commissioned by W. R. Berkley, a prominent American entrepreneur and chairman of the W. R. Berkley Corporation. Berkley is no stranger to exceptional timepieces; he also owns the Reference 57260 and the renowned "King Farouk" pocket watch, underscoring his deep appreciation for complex horology. 

Unparalleled Complications and Features

The "Berkley Grand Complication" encompasses nine categories of complications, each showcasing Vacheron Constantin's mastery:​

• Timekeeping: Features a regulator-type display with hours at the 12 o'clock position, minutes, and a unique retrograde seconds mechanism at 6 o'clock.​

• Astronomical Functions: Includes a groundbreaking Chinese perpetual calendar—a first in watchmaking—alongside a celestial chart calibrated to Shanghai's coordinates, displaying sunrise and sunset times.​

• Chronograph: Equipped with a split-seconds chronograph governed by a three-column wheel mechanism, allowing precise timing of multiple events.​

• Chiming Mechanisms: Incorporates an alarm with selectable chime modes, a carillon Westminster chiming function with five gongs and hammers, grande and petite sonnerie, minute repeater, and a customizable nighttime silence mode.​

The inclusion of the Chinese perpetual calendar presented significant challenges, requiring extensive research and development to accurately represent the complexities of the Chinese lunisolar system. ​

A Testament to Vacheron Constantin's Legacy

The creation of the "Berkley Grand Complication" demanded 11 years of dedicated work, involving a team of master watchmakers who meticulously designed, assembled, and finished each component. This timepiece not only exemplifies Vacheron Constantin's commitment to pushing the boundaries of mechanical artistry but also honors its 270-year heritage of crafting exceptional watches. ​

With the Les Cabinotiers "Berkley Grand Complication," Vacheron Constantin has once again set a new standard in the world of haute horlogerie. This timepiece is a remarkable fusion of technical innovation, artistic design, and cultural homage, solidifying its place as a pinnacle achievement in watchmaking history.​

Sources:

• https://edition.cnn.com/2025/04/01/style/vacheron-constantin-most-complicated-wristwatch/index.html 
• https://www.straitstimes.com/life/vacheron-constantin-has-made-the-worlds-most-complicated-wristwatch 
• https://robbreport.com/style/watch-collector/vacheron-constantin-most-complicated-wristwatch-in-world-1236442818/