Self-winding watches Automatic watches combine convenience with fascinating mechanics. They possess a rotor which gains momentum through the movement of the wrist, winding the watch’s mainspring barrel. The watch does not need to be wound manually when it is worn regularly or the momentum maintained in a watch winder.

The rotor is also a decorative feature in and of itself. The watch’s sapphire-crystal caseback makes it visible. The wearer can feel and hear the movement at work. All Lange rotors come with the company’s lettering. They are generally made of 21-carat gold and include an oscillating weight made of platinum, which gives the rotor significant momentum. It interacts with the winding train to ensure that the maximum power reserve can be achieved even after just a short time wearing the watch. 

Technical drawing of the components of a self-winding movement