Shifting the paradigm of modern-day watchmaking, Bulgari has established itself as the Master of the Estetica della Meccanica, balancing superior savoir faire and the innovative aesthetics of ultra-thin watches to create groundbreaking timepieces. This expression of the unique fusion between cutting-edge design and the technical expertise of Swiss watchmaking is an exercise of the utmost complexity which can be seen in Bulgari’s mastery of highly complicated watches, including the whole typology of chiming timepieces: 2, 3 and 4 hammers, from the Octo Finissimo Minute Repeater to the Octo Roma Grande Sonnerie.

Thanks to its unrivalled expertise in this field, now the brand explores new facets of its Estetica della Meccanica inspiration, creating new Sinfonia della Meccanica masterpieces with the one-of-a-kind Octo Roma Emerald Grande Sonnerie and the Octo Roma Carillon Tourbillon Blue Edition.

Bulgari beautifies time by making it chime through the bejewelled embodiment of the brand’s irrepressible Italian style and elegance mingled with Swiss watchmaking expertise and the highest creative skills. More than ever, the Jeweller of Time demonstrates its ability to merge and magnify the arts of jewellery, fine watchmaking and artistic expressions into striking creations that boldly proclaim their difference.

Horological complications have for decades followed principles involving narrow codification and extreme classicism. Bulgari has always ignored these terms. Witness the new Octo Roma Carillon Tourbillon, in which the two traditional complications of the tourbillon and the striking mechanism speak a resolutely modern language.

Contemporary interpretation is an integral part of the creative acts of the Maison, which applies it daily to its watchmaking developments. Such is the case with the new Octo Roma Carillon Tourbillon which, while combining two essentially classic complications, redefines watchmaking tradition in a resolutely modernist approach. This watch features a highly graphic skeletonised movement with blue bridges. The platinum case is encircled by a blued titanium caseband.

It has been designed to amplify the sound rendition and clarity, which is the primary parameter governing the construction of a striking watch. The Octo Roma Carillon Tourbillon movement with three hammers, hand-wound calibre BVL428, measures 35 mm in diameter, 8.35 mm thick and comprises a total of 432 components. It is entirely manufactured in-house.

The generous proportions of the case are designed to maximise sound propagation, enabling increased torque from the three-tone construction and greater sound power production. In particular, the caseband is designed to maximise sound and allow it to spread as much as possible. It has cavities inside the design to reduce the amount of metal between the inside and outside, and three openings on the caseband that correspond to the three gongs, thus allowing the sound to exit the chamber.

The gongs are attached directly to the body of the case for the most efficient sound transmission and the middle-case is made of titanium to ensure the clearest possible sound diffusion. The back is also hollowed out and redesigned with a titanium grid that protects this resonant area and enables outward transmission of the sound.

The gongs on the watch are hand-crafted in several stages. They are bent and formed by hand before being annealed, or hardened, at a temperature of 900 degrees Celsius, then cleaned before being reheated in a 500-degree kiln, a process that endows the metal with its crystal-clear resonance. Like some components of the striking mechanism, they are drawn out with a file, in order to refine the chords of the chime. The melodic sequence of this chime with three hammers striking three tones plays the note C for the hours, the notes E D C for the quarters and the note E for the minutes. The mechanism is activated by a pusher on the left side of the caseband.

The movement is equipped with one classical barrel ensuring the power reserve of at least 75 hours for the movement at full charge, meanwhile the functioning of the sound mechanism is ensured by a spring which is contained in a barrel-shaped container drilled directly in the bridge.

The architecture of the BVL428 calibre, the cut-out of the bridges and the positioning of the various components are original, contemporary and contrasted in order to reveal the beauty of the mechanism. The hammers, gongs, tourbillon cage and perforated surfaces are made of alternating polished steels, while the finely worked mainplate and bridges feature an ALD treatment. The high-tech carbon-based vacuum-deposition coating is an elegant deep blue.

Available in a 30-piece limited edition the watch has a transparent sapphire crystal caseback, is water-resistant to three atmospheres, and comes with a blue alligator leather strap secured by a platinum triple-blade folding clasp.

Reference	:	103627
Limited edition	:	30 pieces
Movement	:	BVL428 calibre Manufacture mechanical manual winding Minute repeater Three-hammer carillon tourbillon and power-reserve indicator Movement and blue-treated bridges
Power reserve	:	75 hours
Frequency	:	21'600 VpH
Jewels	:	36
Diameter	:	35.00 mm
Thickness	:	8.35 mm
Case	:	Platinum Openworked titanium middle-case
Diameter	:	44 mm
Crown	:	White gold, set with a black ceramic insert
Pusher	:	White gold pusher to activate the chime
Thickness	:	12.83 mm
Bracelet	:	Blue alligator
Buckle	:	Platinum triple-blade folding clasp