Another year and another record broken by serial offenders Bvlgari as the Bvlgari Octo Finissimo Perpetual Calendar becomes the world’s thinnest automatic perpetual calendar (with micro rotor), at 5.80mm, with the thinnest automatic (micro rotor) movement, with calibre BVL 305 measuring just 2.75mm thick (or thin as Bvlgari watchmaking boss Antoine Pin noted in his