In the 70s, the advent of quartz shook the foundation of the watchmaking industry, spurring watchmakers to find innovative solutions to the ravages caused by the emergence of this new technology. The Manufacture responded by breaking mechanical records with its world’s thinnest perpetual calendar mechanism in 1978, as well as by releasing revolutionary mechanical watches combining tradition and avant-garde design. Audemars Piguet introduced its first hand-wound “Philosophique” watch in 1982, inviting wearers to question the notion of passing time. This model referred back to the beginning of time measurement devices, which were equipped with a single hour hand until the beginning of the 18th century to simplify energy transmission.