Bulgari leads the battle for the thinnest mechanical watch with Octo Finissimo Ultra COSC

With the release of the Bulgari Octo Finissimo Ultra COSC, the battle for the thinnest watch has reached the slimmest size. Taking on watchmakers like Richard Mille and Piaget in the run for the crown, the new Bulgari is a more capable and slimmer rendition of the Octo Finissimo Ultra, the company’s previous slender watch which once held the coveted title of being the skinniest wristwatch.

Watch enthusiasts, especially Bulgari lovers, would remember the Octo Finissimo Ultra from 2022, which then was the thinnest mechanical watch on the planet measuring only 1.8mm at the thickest point. The watch was finished in a 40mm sandblasted titanium case with an integrated bracelet customized to complement the record-breaking watch’s form factor.

Designer: Bulgari

Despite the slimness to offer, the record-setting Octo Finissimo Ultra had that glory shortened by Richard Millie’s Ferrari collaboration timepiece that took watchmaking to a new slimmer form factor. The RM UP-01 Ferrari manual winding ultra flat – as the collab was named – became the new record-setter with slimness measuring .05mm thinner than the Bulgari’s watch.

Richard Millie’s offering lived on as the world’s thinnest watch since. It’s finally overthrown by the new Octo Finissimo Ultra COSC, which puts Bulgari back on the top of the record list. The new Bulgari, to that accord, is the world’s slimmest mechanical watch with only 1.70mm thickness. The new milestone in watchmaking comes along with independent Contrôle Officiel Suisse des Chronomètres (COSC) certification assuring precision and accuracy in time telling. Thanks to the certification, Octo Finissimo Ultra COSC also becomes the thinnest COSC-certified watch, adding another feature to its cap of utmost sleekness.

In addition to the minimum slimness, Bulgari’s new watch has notable features which start with its sandblasted titanium case and tungsten carbide caseback. Paired with a matching strap, the world’s thinnest watch will be strictly limited to just 20 examples with each priced at $529,000. Given the 1.70mm thickness we’re taking about, it’s a given that winding the watch wouldn’t be easy. Understandably then, Octo Finissimo Ultra COSC be provided with a case for its automatic setting and winding.

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