The DualTow watch was created Christophe Claret to celebrate the 20th anniversary of Le Locle based manufacture.
From Professional Watches: The most innovative attribute, is its unique single-pusher planetary-gear chronograph with striking system. A single-push piece activates three identically structured planetary gears that control the chrono functions. A patent has been filed for this original interpretation of the chronograph. As if that is not enough, Christophe Claret has chosen to add a striking mechanism signaling when the chronograph is started, stopped and reset.