Chronomat B01 42 Stainless Steel / Blue / Rouleaux

The Breitling Chronomat B01 Chronograph 42 AB0158101C1A1 is part of the 2026 Chronomat redesign, which updated the collection’s case and bracelet architecture while retaining the rider-tab bezel and the design language introduced with the 1980s Chronomat. This stainless steel reference has a 42mm case, a blue dial with black chronograph counters, and a stainless steel Rouleaux bracelet. The case measures 13.77mm thick, reduced from the earlier 15.1mm profile, and uses the revised Chronomat construction with concealed lugs. The case is water resistant to 200 meters and fitted with a cambered sapphire crystal with anti-reflective treatment on both sides. Its unidirectional ratcheted bezel has raised rider tabs, numerals, and minute indexes. For the 2026 Chronomat B01 42, Breitling revised the bezel construction into a single-piece component integrating the bezel ring, insert, rider tabs, and screws. The rehaut no longer carries the previous 1/100 scale, and the crown guard has been reduced in size. The blue dial is configured with black chronograph counters, applied hour markers, central hands, and Super-LumiNova on the hands and indexes. Its display includes central hours and minutes, small seconds, chronograph seconds, 30-minute and 12-hour chronograph counters, and a date aperture. Inside the watch is Caliber B01, a COSC-certified self-winding manufacture chronograph movement with a column wheel and vertical clutch. It runs at 28,800 vibrations per hour and uses 47 jewels. This reference is fitted to a stainless steel Rouleaux bracelet with a concealed butterfly clasp and Breitling’s patented micro-adjustment system.