With the new Chapter 4 Infinity Flying Tourbillon, the Neuchâtel-based brand takes its boldest swing yet: a chronometer-certified flying tourbillon with complications, elegant finishing, and a price that’ll likely raise some eyebrows. At 41mm, the polished 904L steel case feels refined but substantial, its concave profile and welded lugs giving the watch a sculptural presence. The dial, in a rich cosmic blue, catches the light with a sunray finish and subtly off-centered layout: moonphase at 1 o’clock (hammered and polished), small seconds at 10, and that showstopping flying tourbillon at 7 o’clock. The tourbillon itself, developed once again with Olivier Mory, floats freely, unanchored by an upper bridge, doing its gravity-defying rotation once per minute. The hand-wound movement has a 120-hour power reserve and, impressively, chronometer certification from the Observatoire Chronométrique de Genève. That last detail matters: it’s a rare stamp of technical precision. A domed sapphire crystal puts the open movement on full display, with polished bridges and finishing that punch well above the price tag. BA111OD’s rise has been unconventional by design, and this release is no exception. The Infinity Flying Tourbillon is proof that tradition and disruption aren’t mutually exclusive.