Montblanc Metamorphosis TimeWriter 1 in action

The Metamorphosis was unveiled at SIHH 2012 by Montblanc. It is a chronograph with two dials, one that tells the time, and the other that shows the chronograph display. The watch transforms from one dial to the other via the slide on the case side. Pull the slide and the dial transforms. The mechanism is similar to a minute repeater; the slide winds up a small spring that powers the transformation.