Audemars Piguet

Audemars Piguet has long been revered in the world of horology, not only for iconic timepieces like the Royal Oak but also for its expertise in crafting exceptional perpetual calendars. Introduced in 1978, the Quantième Perpétuel Ref. 5548BA was not only the brand’s first self-winding perpetual calendar but also the world’s thinnest automatic perpetual calendar at the time, measuring just 8mm thick. Remarkably, its diameter remained a sleek 36mm, without any increase to accommodate its complexity—an extraordinary achievement in mechanical watchmaking. Upon its release, it was one of the few perpetual calendar wristwatches available, further solidifying its status as a marvel of engineering.

Designed with classical proportions, the Ref. 5548 features an elegant 36mm case, typically crafted in yellow gold, white gold, or platinum, with a clean and sophisticated dial layout. Staying true to timeless design principles, it boasts a traditional stepped bezel, short downturned lugs, and refined, well-balanced proportions. The dial maintains a harmonious symmetry, showcasing a perpetual calendar with day, date, and month subdials, along with a moon phase display at 6 o’clock—an exquisite detail that enhances its enduring appeal.

Despite the dominance of quartz technology during the era, Audemars Piguet boldly pursued innovation with the development of the cal. 2120/2800 movement. The brand embraced creativity in design, materials, and craftsmanship, offering collectors an array of choices that reflected the vibrant trends of the time. In an era when many watchmakers were shifting focus to quartz, Audemars Piguet’s dedication to high-complication mechanical watches was both audacious and visionary.