Vacheron Constantin outdoes its prior record-setting timepiece taking the crown, once again, for the world's most complicated mechanical watch with the debut of The Berkley Grand Complication, a massive, one-of-a-kind pocketwatch crafted for William R. Berkley.

Based on the same ebauche as Vacheron Constantin reference 57260, which previously held the world record, The Berkley boasts 63 complications constructed from 2,877 individual components. Of note among the complications, The Berkley features the world's first Chinese perpetual calendar and can strike the time in passing or on demand—in full Westminster grandeur—across five gongs.