Breitling watch chronomat 41 diver pro iii ab014012f554151s power performance precision the chronomat 41 combines an exceptional fuselage with the selfwinding chronograph manufacture breitling caliber 01 motor chronometer certified by the cosc as indeed are all the brands movements the 41mm diameter of its sleekly curved case makes it suitable for all wrist sizes it is equipped with a screw locked crown and pushpieces as well as substantial protective control guards