The Ref. 2523 "worldtimer" displays the time in dozens of cities simultaneously on a rotating enamel disc — a mechanical feat that was staggeringly advanced for its era, especially in the small numbers Patek made through independent retailers like Milan's Gobbi.
It's become a textbook example of how vintage worldtimers went from niche curiosities to blue-chip auction stars in barely a decade, as collectors chased anything mechanically complex and genuinely rare.
Ad space