"Tremendous value here. The Chapter 4 Onyx Flying Tourbillon is a great example of BA111OD at their best: a stunning onyx dial and a manual wind flying tourbillon with 120-hour power reserve priced at $11,900. It’s not cheap of course, but it’s a fraction of what you’ll find out there."
This gorgeous minimalist dress watch should cost 5x more. Swiss watchmaker Ba111od offers the precision of a tourbillon escapement and the beauty of a clean onyx open-heart dial at a relatively affordable price.
PURE, SUSPENDED and INTENSE
THE ART OF MASTERING GRAVITY
With its flying tourbillon appearing to float in mid-air, the Chapter 4 Infinity is a celebration of mechanical poetry. Freed from its upper bridge, the tourbillon rotates gracefully at 7 o’clock, compensating for the effects of gravity and enhancing chronometric precision. Its hypnotic motion reminds us that watchmaking, at its highest level, is not just engineering — it’s art.
A SCULPTURE IN BLACK
Set in a concave 41mm polished 904L steel case, this timepiece features a dial cut from natural black onyx — a smooth, dense variety of chalcedony prized for its deep, mirror-like surface. Polished to a high gloss, the stone offers a rich visual depth that draws the eye to the flying tourbillon suspended above. A discreet black-on-black logo adds a final touch of refinement, allowing the pure materials and mechanics to take center stage. Understated yet striking, it’s a study in refined minimalism.
A Legacy Reinvented
Rooted in Neuchâtel’s centuries-old watchmaking heritage, BA111OD continues to disrupt with innovation, daring, and accessibility. The Chapter 4 Onyx Flying Tourbillon is not just a tribute to tradition — it’s a bold evolution of it. Designed for those who seek both meaning and mastery in their timepiece.