Four years after unveiling the X-TREM-1 timepiece, the watchmaker from Le Locle reveals two new versions in blue damascened steel, issued in 8-piece limited edition. X-TREM-1, the first of a generation of exceptional timepieces, represents a major technical and aesthetic accomplishment: a flying tourbillon inclined at a 30° angle, mounted on a three-dimensional curvex titanium mainplate, equipped with a retrograde hours and minutes display system that is radically different from existing watchmaking conventions. Two tiny hollowed steel spheres, isolated within cages on the left and right sides of the caseband, magically move with no mechanical connection thanks to magnetic fields.