Chapter 4 · Tourbillon T.V.D.
Chapter 4 · 2026

TOURBILLON T.V.D.

The first expression of our new in-house tourbillon.

01 · IN-HOUSE Movement

Calibre BA.01

The first tourbillon designed and developed within the BA111OD ecosystem. Hand-wound, variable-inertia balance, 19 jewels.

02 · Architecture

The skeleton revealed

An openworked construction inspired by skeleton aesthetics. The centre lightened to reveal the tourbillon and the engraved barrel cover.

03 · Precision

Chronometer certified

Watch head certified as a chronometer by the Geneva Chronometric Observatory.

04 · PROMISE

MAKING THE EXCEPTIONAL ACCESSIBLE

With the integration of BCP Tourbillons, BA111OD is now more empowered than ever to bring this vision to life.

Distinctive Character.

Technical Depth.

Available in 39 mm and 43 mm, the new Chapter 4 Skeleton Tourbillon marks the integration of BA111OD’s first in-house tourbillon calibre. Its 904L stainless steel case with gunmetal anthracite DLC treatment, satin-brushed finishes, sandblasted flanks, and sapphire box crystal create a bold and highly technical presence. Combined with an openworked dial, 120-hour power reserve, and Timelab chronometer certification, it embodies BA111OD’s contemporary vision of Swiss watchmaking.

DISCOVER 39 mm versionDISCOVER 43 mm version
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BA111OD ∙ Neuchâtel ∙ Switzerland ∙ Est. 2019