Bvlgari is a brand that loves to push the envelope, not only in terms of design but also when it comes to technical innovations. In recent years they have made quite a name for themselves with an extensive range of (complicated) ultra-thin movements, but now they are also flexing their considerable horological muscles with the Octo Grande Sonnerie Perpetual Calendar.
Captured in a 44 millimeter large case in the signature Octo-design is a movement that combines telling time with a Grande and Petite Sonnerie, minute repeater, tourbillon and a perpetual calendar with moon phases. While the combination of a Grande and Petite Sonnerie with a minute repeater is quite common, as they are related complications, adding a perpetual calender is not, and the tourbillon is simply the cherry on top. By applying a semi-transparent dial, the complexity of caliber BVL 5307 cannot only be admired from the front, but also from the back through a transparent case back.
The movement itself is manual-wind, and on the dial two indicators tell the power reserve of not only the caliber itself but also the chime function. Despite its remarkable complexity Bvlgari kept the dial easy to read and the way you operate it straight forward. Combined this results in an absolute horological powerhouse and …. the most complicated Bvlgari to date!