Octo Finissimo Perpetual Calendar, the slimmest in the world, redefines the limits of contemporary fine watchmaking, a dynamic that began in 2014 and involved rewriting the heritage conventions of traditional watchmaking year after year based on modern codes. A successful exercise: Octo Finissimo has set a trend and reinvented high-flying contemporary watchmaking by bringing it that touch so brilliantly mastered by the Italian House of Bvlgari: L'Estetica della Meccanica, or the art of in-depth innovation with regard to both form and substance. Aesthetics are inseparable from functionality when it comes to reinterpreting a sophisticated classic horological complication in a resolutely contemporary manner. The outcome? No less than 408 components interacting within the extremely limited space provided by the slender 5.80 mm case of the Octo Finissimo Perpetual Calendar. The development of the 2.75 mm calibre required the movement design engineers of the Manufacture in Le Sentier to devise new solutions, such as the use of a micro-rotor and the optimal use of the space between the components without reducing their dimensions. Testifying to true genius in the realm of miniaturisation, this development powers the hours and minutes hands along with all the perpetual calendar functions: retrograde-display date, day, month and retrograde-display leap years. They are adjusted by means of three correctors: one for the date at 2 pm, another for the month at 4 pm and a third for the day between 8 and 9 o’clock.