Gérald Genta did not only change the face of modern watchmaking with his designs for game-changing models such as the Royal Oak and the Nautilus, but he was also one of the first to create highly complicated timepieces right at the offset of the quartz crisis in the late 1980s.

In 1991, he launched his Octagonal collection with models housing a powerful 8-sided case reminiscent of his previous work but with a more daring approach.

Not just a designer, he always looked to push technical boundaries by creating some of the world’s most complicated wristwatches, including his now iconic Grand & Petite Sonnerie models.

The Sonnerie models aside, the present example is one of the rarest and most complicated produced by Genta as it features a minute repeater, a tourbillon visible from the back, a perpetual calendar and a very, very seldom seen worldtime function.

The watch was serviced at Bulgari (owner of the Genta brand) in 2024 for an impressive amount of CHF 32,000.