Bulgari has already broken several horological thinness records at Baselworld, and now we know that the Italian brand didn’t plan to make an exception this year: After the launch of the world?s thinnest tourbillon movement at Baselworld in 2014 (thanks to a 1.95-mm-thin, hand-wound movement in a 5-mm case), the thinnest minute repeater in 2016 (with a 3.12-mm-thin movement in a 6.85-mm case) and the thinnest self-winding watch, at only 5.15 mm in 2017, Bulgari has now managed two break two records at the same time:

At just 3.95 mm thick, the new Octo Finissimo Tourbillon Automatic is not only the thinnest tourbillon watch, but also reclaims the title as the thinnest serially produced automatic watch from Piaget (last December, Piaget briefly became the record holder for the world?s thinnest serially produced automatic watch, coming in at only 4.3 mm thick).
In the case of the new Tourbillon Automatic, Bulgari based the overall construction of the movement on the Finissimo tourbillon movement launched in 2014. The new caliber ? BVL 288 ? handles automatic winding not via a micro-rotor (like the Octo Automatic), but via a peripheral oscillating weight positioned on the back of the movement:

The oscillating weight is made of white gold and aluminum, two metals whose contrasting density (16.4 versus 2.70 grams per cm³) should enable the circular weight to oscillate more efficiently. The movement also incorporates a flying tourbillon equipped with a ball-bearing system...