The most important thing about this watch though is the introduction of the new in-house Montblanc caliber MB 25.10. This is an automatic chronograph movement made of 232 components (33 of which are jewels) that provides a 46-hour power reserve. It has a column wheel as well and the chronograph action felt pretty good during the brief time I got to spend with the watch. The caseback of this watch has a smoked sapphire window, but you can still get a view of the movement. This execution has a dark-colored winding rotor shaped like a steering wheel to play up the racing inspiration. You'll notice that the movement is only 30.15mm in diameter, meaning it could eventually find its way into watches much smaller than 43mm.