Thermally Powered Mechanical Wristwatch

Raghu Mani writes "Theremally powered quartz wristwatches - which use minor temperature variations to generate electricity - have been around for a few years. Now here is something a lot more radical - a thermally powered mechanical watch. Invented by an American - Steven Phillips - it uses small temperature variations to wind the mainspring of the watch. A patent has been awarded for this - check out this link. A small article on the technology can be found here and the guy's own website is budapestwatchco.com. I doubt if any of us will be buying one of those watches anytime soon, though - just check out those prices ;-)."