A Closer Look At The New Bulgari Octo Roma Carillon Tourbillon

Behind the grille of this intriguing timepiece lies the brand-new, manually wound Caliber BVL428, featuring a three-hammer minute repeater with a Westminster chime and a tourbillon.

The new Octo Roma Carillon Tourbillon isn’t the first chiming timepiece to be created by the brand. In 2016, Bulgari unveiled its Octo Finissimo Minute Repeater, followed by its Octo Roma Grande Sonnerie in 2019 with four hammers and a whopping 1,200 components.
 

Inside this recent release, the new caliber BVL428 measures 35mm in diameter and is only 8.35mm thick, attesting to the brand’s savoir-faire in the domain of ultra-thin movements. It features one classical barrel to ensure a power reserve of at least 75 hours. Additionally, a spring contained within a barrel-shaped container, drilled directly to the bridge, assures the functionality of the minute repeater's chiming mechanism.

The movement has 432 total components and constructed to prioritize the sound of the gongs and decorated using several techniques to create a contemporary aesthetic.
 

Bulgari has paid particular attention to allowing the sound escape from the timepiece while keeping a water-resistance of 30 meters. Firstly, the contemporary-looking grille dial lets the sound resonate through the movement.
 

Secondly, there is the specially designed middle case. It features hollowings that reduce the amount of metal between the inside and the outside. Moreover, for maximum resonance, the gongs are affixed directly onto the body of the middle case. Each of the three gongs also has its own opening in the case, which permits sound to exit the chamber more effectively.
 

Lastly, the hollowed caseback, with its titanium grille, protects the chiming mechanism while ensuring the diffusion of sound. All in all, the sound is created in the perfect environment to delight the client’s sensorial senses.