In this feature from the WatchTime archives, we take a look at the Montblanc TimeWalker TwinFly Chronograph, with its two central elapsed-time flyback hands. In 2011, Montblanc unveiled the Montblanc TimeWalker TwinFly Chronograph, which contains a caliber called the MB LL100. The movement has an unusual feature: a center-mounted elapsed-minutes hand. Such hands were common…