Louis Erard continues to reinvent traditional métiers dart with this second hand guilloché dial. Guilloché is no longer a question of decoration; its a subject in and of itself: a large diamond, an ace of diamonds, with a kinetic feel. Its no longer a question of revisiting an old aesthetic, but of putting the technique at the service of a contemporary composition. The guilloché required all the dexterity of the guillocheuse: the artisan produces the 99 dials piece by piece, each one taking several hours of work on the manual guilloché rose engine lathe. Not to mention the engineers, who had to invent and manufacture new cams to achieve this unprecedented result.