A classic round case in steel, a narrow bezel for a large opening on the white dial, a top-performing, COSC-certified movement: form and function brilliantly combine in what is the highlight of Breitling's Premier collection. Its understated elegance and lasting appeal come from the 1940s watch that inspired the overall aesthetic of this new range. However, the "engine" powering the Premier B01 Chronograph 42 is very much of today. For keeping track of short intervals, Breitling has enlisted none other than its star calibre, the B01, whose multiple assets include an impressive 70-hour power reserve.