A ref. 730.032 1815 Tourbillon, the world's first watch to pair a hacking tourbillon with Lange's zero-reset mechanism—a tourbillon that can actually be set to the exact second. Introduced in 2014, it is a pure expression of the manufacture's precision-first philosophy. It features a 39.5mm case just 11.1mm tall, solid silver dial with railway minute track and blued alpha hands, and the hand-wound calibre L102.1 comprised of 262 components. In a nod to old 1A-quality, its black-polished cage is crowned by a diamond pivot in a screwed gold chaton. The 1815 Tourbillon brings a new take on precision within the tourbillon canon, interpreted through the most traditional aesthetic criteria Germany offers.