Chapter 4 Skeleton Tourbillon T.V.D. (43mm)

FIRST IN-HOUSE TOURBILLON A bold expression of contemporary Swiss watchmaking, this 43 mm skeleton tourbillon marks a major milestone for BA111OD with the integration of its first in-house tourbillon calibre. Conceived for collectors who seek character as much as performance, this 43 mm skeleton tourbillon brings together precision, depth, and emotion in a design defined by daring and substance. Crafted in 904L stainless steel with a gunmetal anthracite DLC treatment, it reveals a sharper, more architectural interpretation of BA111OD’s signature Chapter 4 language. Its openworked construction draws the eye to the tourbillon at 7 o’clock while opening a clearer view onto the barrel, the source of its remarkable 120-hour power reserve. Anthracite hands with Super-LumiNova® ensure legibility, while the blue screw serving as the running seconds adds a distinctive and unconventional touch. Created within BA111OD’s integrated movement development workshop in La Chaux-de-Fonds under the direction of Olivier Mory, this hand-wound mechanical movement beats at 3 Hz and is chronometer-certified by Timelab, the Geneva Observatory of Chronometry. Developed exclusively with local co-contractors from the Neuchâtel region, this Chapter 4 Skeleton Tourbillon embodies BA111OD’s vision of contemporary Swiss watchmaking: technical substance, emotional resonance, and daring design. List of compatible watchbands : Bracelets – BA111OD