Chapter 4 Infinity Flying Tourbillon

The Architect

ExpertOct 11, 2026

76

BA111OD occupies a peculiar coordinate within the contemporary independent watchmaking matrix — a brand constructed from deliberate irreverence, yet consistently producing complications of measurable technical ambition. The Chapter 4 Infinity Flying Tourbillon represents the brand's most concentrated exercise in this duality. The flying tourbillon, suspended without the conventional upper bridge, produces a visual clarity that its predecessors in the Chapter lineage approached but did not fully resolve. Concordantly, the moon-phase integration reads as a considered compositional decision rather than an additive indulgence, and the dial architecture sustains legibility at a threshold that many dress complications abandon. The caliber BA.02 — manual-wound, 120-hour power reserve — reflects a movement specification that is defensibly exceptional for an independent at this price tier; the probability of encountering equivalent reserve figures in this category approaches rarity without reaching singularity. The case, at 9.75 millimeters thin for a complication of this density, demonstrates disciplined engineering. The stainless steel execution, vis-à-vis the brand's occasional use of more precious materials, is adequate without being distinguished. The dark blue leather strap functions as utilitarian completion — it does not undermine the dial, but neither does it elevate it. As you undoubtedly gather, the value proposition is the axis of genuine ambiguity: $15,227 positions this iteration against maison complications of greater heritage, where BA111OD's novelty must substitute for provenance.