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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Bulgari says its 2025 Octo Finissimo Ultra Tourbillon is the world’s thinnest tourbillon watch, measuring just 1.85 mm thick overall. That is a tourbillon-specific record claim—not a claim that it is the world’s thinnest watch of any kind. The skeleton tourbillon, titanium case and bracelet, and tungsten-carbide main plate make the record visible in the watch’s construction as well as its profile.
What is the thinnest tourbillon watch?
Bulgari presented the Octo Finissimo Ultra Tourbillon at Watches and Wonders 2025 and describes it as the thinnest tourbillon watch ever, at 1.85 mm total thickness. The superlative and the brand’s claim that this is its tenth world record in ultra-thin watchmaking are Bulgari’s; the sources cited here do not establish certification by an independent record-keeping body. Bulgari’s Watches and Wonders 2025 page frames the achievement specifically around integrating a skeleton tourbillon into an ultra-thin watch.
The distinction matters: the 1.85 mm figure identifies this as a record-setting tourbillon, not the thinnest watch overall. Bulgari’s Japan product announcement identifies the model as reference 104313.
How thin is the watch, and what are its specifications?
Bulgari Japan’s 2025 announcement lists a 40 mm case and a 1.50 mm-thick integrated titanium bracelet. It specifies a manually wound BVF900 tourbillon movement running at 28,800 vibrations per hour, equivalent to 4 Hz, and gives a 42-hour power reserve.
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- Exclusive Limited Edition Only 100 Pieces Worldwide: Each LONGIO Volcan Tourbillon is part of a strictly limited run of just 100 pieces worldwide, ensuring true rarity and exceptional collector's value
- A Tribute to Earth's Sublime Power: Inspired by the majestic force of volcanic eruptions, the Volcan blends elemental power with refined elegance for a distinctive luxury statement
- Central Tourbillon Engineering: Features a rare mechanical hand-wound central tourbillon rotating once every 60 seconds, with 16 precision screws on the cage to achieve balance
- High-Performance Hand-Wound Movement: Driven by a hand-wound mechanical movement beating at 21,600 vibrations per hour (3 Hz), with 19 jewels and an impressive 48-hour power reserve, visible through a sapphire crystal case back
- Robust 42mm DLC Titanium Case: Engineered from lightweight titanium and finished with Diamond-Like Carbon (DLC) coating for exceptional scratch resistance and a sophisticated black aesthetic, ensuring durability and elegance
| Specification | Published figure | Source and qualification |
|---|---|---|
| Total watch thickness | 1.85 mm | Bulgari, 2025 |
| Case diameter | 40 mm | Bulgari Japan, 2025 |
| Bracelet thickness | 1.50 mm | Bulgari Japan, 2025 |
| Movement | BVF900, manual winding, tourbillon | Bulgari Japan, 2025 |
| Frequency | 28,800 vibrations per hour (4 Hz) | Bulgari Japan, 2025 |
| Power reserve | 42 hours | Bulgari Japan, 2025; Hodinkee reports a conflicting 50 hours |
| Reference | 104313 | Bulgari Japan, 2025 |
There is a discrepancy in published power-reserve figures. Bulgari Japan states 42 hours, while Hodinkee’s March 31, 2025 launch report gives 50 hours. The manufacturer’s announcement is the official product specification cited here; the secondary report’s figure should not be treated as settled.
How does the construction achieve the record profile?
The 1.85 mm profile depends on an unusually integrated layout, not simply a thin conventional case. Bulgari describes a skeleton tourbillon and a tungsten-carbide main plate, with sandblasted titanium used for the lugs, bezel, and middle case. The bracelet is titanium, measures 1.50 mm thick, and has an integrated folding clasp.
Rank #2
- This tourbillon crafted by Swiss chief designer Etienne Ruffieux with modern architectural aesthetics, features a lightweight, comfortable, free-sprung balance flying tourbillon. It houses an independently developed architectural tourbillon movement adorned with oversized ruby bearings. The design aesthetic is expressed through the interplay of light and shadow created by its extreme skeletonization. The watch has been honored with the IAI Global Design Award for its outstanding original design.
- Independently developed CAL9001 free-sprung balance flying tourbillon movement, manual winding, 28,880 vibrations per hour, 25 ruby bearings. Features high-end finishing including satin brushing and beveled edges, engraved brand logo with gold-stamped. Dual mainspring series technology delivers 80-hour power reserve (twice that of standard tourbillon movements). This technology ensures more uniform and gradual mainspring release, resulting in enhanced timekeeping precision and stability.
- The CAL9001 tourbillon movement features the exclusive free-sprung micro-adjustment technology typically reserved for luxury timepieces. This free-sprung system eliminates the need for a balance spring regulator, thereby overcoming the timing inaccuracies caused by regulator displacement in conventional mechanical movements. This ensures the watch delivers enhanced precision and stability in timekeeping.
- This tourbillon measures 40mm in diameter and just 9.7mm in thickness, weighing a mere 67 grams. Its meticulously engineered structure and radically skeletonized tourbillon movement eliminate all superfluous metal components, allowing the mechanical artistry of the free-sprung flying tourbillon to shine in its purest form. It is an exquisite, high-end tourbillon watch that is both ultra-thin and supremely comfortable.
- The watch is water-resistant to 50 meters, featuring a double-sided sapphire crystal and an Italian leather strap with hand-stitched detailing for comfortable and durable wear. We offer a three-year worldwide warranty.
The winding crown sits at 8 o’clock and the time-setting crown at 3 o’clock, according to the product description. Stainless-steel winding and time-setting wheels are also specified. These are concrete construction details; they do not, by themselves, establish claims about durability, comfort, or real-world timekeeping performance.
How does it fit into Bulgari’s ultra-thin watchmaking history?
Bulgari’s Japan announcement presents the Ultra Tourbillon as the latest entry in a decade-long sequence of ultra-thin achievements. The brand cites a 3.12 mm minute repeater in 2016, a 2.23 mm automatic watch in 2017, a 2.75 mm perpetual calendar in 2021, and the 1.8 mm Octo Finissimo Ultra in 2022, which it says received a Prix de l’Audace recognition. The 2025 tourbillon measures 1.85 mm, but belongs to a different complication category. These historical figures and record framing are Bulgari’s own account, rather than independently verified comparisons.
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- Central Tourbillon Engineering: Features a rare mechanical hand-wound central tourbillon rotating once every 60 seconds, with 16 precision screws on the cage to achieve balance
- Limited to 100 Pieces Worldwide: Exclusivity guaranteed with only 100 units crafted for collectors who appreciate rarity and technical artistry
- 47mm Stainless Steel Construction: Robust case architecture with sharp, angular geometry and finely brushed surfaces for a bold, industrial aesthetic
- 1000M Dive Capability: Professional-grade water resistance to 1000 meters, equipped with a helium escape valve for safe saturation diving
- Premium Watch Features: Scratch-resistant sapphire crystal, solid stainless steel bracelet with extension buckle, and precision-engineered rotating bezel for timing functions with Swiss Super LumiNova on both dial index and hands
How much does the Bulgari Octo Finissimo Ultra Tourbillon cost?
Bulgari Japan lists the price as available on request. Hodinkee reported a price of $678,000 and a 20-piece limited edition in its March 31, 2025 launch coverage. Those commercial details are attributable to Hodinkee; the manufacturer announcement cited here does not confirm either the price or edition size. Bulgari Japan’s product announcement provides the reference and technical details, while Hodinkee’s launch report gives the reported price and production figure.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the record does—and does not—tell you
The headline achievement is narrowly defined: Bulgari’s 2025 watch is claimed to be the thinnest tourbillon watch, at 1.85 mm overall. Its significance lies in combining that complication with an exceptionally shallow case-and-bracelet construction. It should not be described as the world’s thinnest watch overall, and the reported price and limited-edition quantity remain secondary-source details in the sources available.
Quick Recap
Best Value
- Exquisite Tourbillon Masterpiece:Powered by a precision manual-winding tourbillon movement, this timepiece features a mesmerizing flying tourbillon at the 6 o'clock position. It perfectly captures the essence of high-end mechanical artistry, offering a dynamic view of the oscillating balance wheel that showcases the pinnacle of watchmaking craftsmanship.
- Scratch-Proof Sapphire Crystal:Protected by premium synthetic sapphire crystal—renowned for being second only to diamond in hardness—this watch face resists scratches from daily wear, keys, and accidental bumps. The anti-reflective coating ensures a clear, sharp dial view under any lighting condition.
- Sophisticated 42mm Profile:With a universally flattering 42mm case diameter and an ultra-thin 12mm profile, this watch sits elegantly on the wrist without feeling bulky. The sleek stainless steel case paired with a genuine leather strap offers a timeless aesthetic suitable for boardrooms, weddings, or formal dinners.
- Reliable 5ATM Daily Waterproofing:Engineered with a 5ATM water resistance rating, it handles daily life with ease—resisting splashes from handwashing, rain, and sweat during exercise. (Note: Not suitable for diving or hot showers). A dependable companion for your active lifestyle.
- The Ultimate Gift for Gentlemen:Presented in a luxury gift box, this tourbillon watch is more than a timekeeper; it's a statement piece. Ideal for husbands, fathers, or bosses who appreciate fine mechanics. Backed by our commitment to quality and customer satisfaction.
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- Exclusive Limited Edition of 100 Pieces: LONGIO Volcan Tourbillon is strictly limited to just 100 pieces worldwide, ensuring rare collectability and elevated value for true horology connoisseurs
- Precision Central Tourbillon with Small Seconds: Features a captivating 60-second tourbillon complication at the 6 o'clock position, combined with small seconds display, designed to counteract gravity for superior timekeeping accuracy
- High-Performance Hand-Wound Movement: Driven by a hand-wound mechanical movement beating at 21,600 vibrations per hour (3 Hz), with 19 jewels and an impressive 48-hour power reserve, visible through a sapphire crystal case back
- Robust 42mm DLC Titanium Case: Engineered from lightweight titanium and finished with Diamond-Like Carbon (DLC) coating for exceptional scratch resistance and a sophisticated black aesthetic, ensuring durability and elegance
- Designed for Comfort and Style: Completed with a black natural rubber strap and folding clasp, offering ergonomic comfort, modern style, and 50 meters of water resistance for versatile luxury wear
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
