BVLGARI Octo Finissimo Ultra COSC Watch represents the pinnacle of modern ultra-thin watchmaking and marks the brand’s ninth world record in this highly specialized field. With an unprecedented total thickness of just 1.7mm, this timepiece not only reclaims the title of the world’s thinnest mechanical watch but also becomes the thinnest COSC-certified chronometer ever produced, successfully balancing extreme thinness with real-world durability.
The Octo Finissimo Ultra COSC Watch is a direct evolution of the groundbreaking 2022 Octo Finissimo Ultra. At that time, BVLGARI had already pushed the in-house BVL180 movement to the limits of mechanical miniaturization. To further reduce thickness, engineers shifted their focus to the sapphire crystal itself. After extensive research and repeated prototyping, the crystal thickness was reduced by an additional 0.1mm, allowing the complete watch to achieve the remarkable 1.7mm profile. The 40mm octagonal case is crafted from lightweight grey titanium, maintaining the iconic architectural design language of the Octo Finissimo line. The caseback is made from tungsten carbide, an exceptionally hard alloy chosen to ensure structural rigidity and resistance to deformation despite the extreme thinness. This combination of materials allows the BVLGARI Octo Finissimo Ultra COSC Watch to deliver both strength and comfort during daily wear. 
In keeping with the watch’s minimalist engineering philosophy, the functional crowns are seamlessly integrated into the case sides. The left side controls winding, while the right side sets the time. BVLGARI also provides a dedicated winding and setting case: by placing the watch inside, the mechanism automatically winds the mainspring and precisely sets the time, eliminating the need for traditional protruding crowns. The openworked dial of the BVLGARI Octo Finissimo Ultra COSC Watch follows a regulator-style layout. The hours are displayed on a sub-dial at 2 o’clock, while the minutes appear at 4 o’clock, each driven by a single hand. Grey PVD-coated sub-dials paired with rhodium-plated hands ensure optimal legibility, while the exposed gear train, balance wheel, escapement, and barrel showcase the movement’s technical beauty. 
At the heart of the watch is the COSC-certified BVL180 manual-winding movement. Measuring just 1.5mm thick, it operates at a high frequency of 28,800 vibrations per hour and delivers a 50-hour power reserve. During assembly, an optical measurement system accurate to one-tenth of a micron was employed, ensuring chronometric precision rated at -4/+6 seconds per day. Turning the watch over reveals a discreet DataMatrix QR code engraved on the caseback. Scanning this code grants access to exclusive documentary footage detailing the development and manufacturing process behind this record-breaking timepiece, reinforcing its role as both a technical milestone and a collector’s artifact. 
The BVLGARI Octo Finissimo Ultra COSC Watch is paired with an ultra-thin titanium bracelet measuring just 1.5mm in thickness, perfectly matching the case in both material and finish. This reference is produced as a limited edition of only 20 pieces worldwide, underscoring its exclusivity and importance within contemporary haute horlogerie. Official retail price: €600,000. 
BVLGARI Octo Finissimo Ultra COSC Ultra-Thin Watch Titanium case, 40mm diameter, 1.7mm thickness, sapphire crystal, openworked grey dial, BVL180 manual-winding movement, 28,800 vph, 50-hour power reserve, ultra-thin titanium bracelet. Discover BVLGARI Octo Watches on Official Website
The Octo Finissimo Ultra COSC Watch is a direct evolution of the groundbreaking 2022 Octo Finissimo Ultra. At that time, BVLGARI had already pushed the in-house BVL180 movement to the limits of mechanical miniaturization. To further reduce thickness, engineers shifted their focus to the sapphire crystal itself. After extensive research and repeated prototyping, the crystal thickness was reduced by an additional 0.1mm, allowing the complete watch to achieve the remarkable 1.7mm profile. The 40mm octagonal case is crafted from lightweight grey titanium, maintaining the iconic architectural design language of the Octo Finissimo line. The caseback is made from tungsten carbide, an exceptionally hard alloy chosen to ensure structural rigidity and resistance to deformation despite the extreme thinness. This combination of materials allows the BVLGARI Octo Finissimo Ultra COSC Watch to deliver both strength and comfort during daily wear. In keeping with the watch’s minimalist engineering philosophy, the functional crowns are seamlessly integrated into the case sides. The left side controls winding, while the right side sets the time. BVLGARI also provides a dedicated winding and setting case: by placing the watch inside, the mechanism automatically winds the mainspring and precisely sets the time, eliminating the need for traditional protruding crowns. The openworked dial of the BVLGARI Octo Finissimo Ultra COSC Watch follows a regulator-style layout. The hours are displayed on a sub-dial at 2 o’clock, while the minutes appear at 4 o’clock, each driven by a single hand. Grey PVD-coated sub-dials paired with rhodium-plated hands ensure optimal legibility, while the exposed gear train, balance wheel, escapement, and barrel showcase the movement’s technical beauty. At the heart of the watch is the COSC-certified BVL180 manual-winding movement. Measuring just 1.5mm thick, it operates at a high frequency of 28,800 vibrations per hour and delivers a 50-hour power reserve. During assembly, an optical measurement system accurate to one-tenth of a micron was employed, ensuring chronometric precision rated at -4/+6 seconds per day. Turning the watch over reveals a discreet DataMatrix QR code engraved on the caseback. Scanning this code grants access to exclusive documentary footage detailing the development and manufacturing process behind this record-breaking timepiece, reinforcing its role as both a technical milestone and a collector’s artifact. The BVLGARI Octo Finissimo Ultra COSC Watch is paired with an ultra-thin titanium bracelet measuring just 1.5mm in thickness, perfectly matching the case in both material and finish. This reference is produced as a limited edition of only 20 pieces worldwide, underscoring its exclusivity and importance within contemporary haute horlogerie. Official retail price: €600,000. BVLGARI Octo Finissimo Ultra COSC Ultra-Thin Watch Titanium case, 40mm diameter, 1.7mm thickness, sapphire crystal, openworked grey dial, BVL180 manual-winding movement, 28,800 vph, 50-hour power reserve, ultra-thin titanium bracelet. Discover BVLGARI Octo Watches on Official Website 
