The classic overbalanced wheel, a so-called "perpetual motion machine", as designed by French Architect Villiard De Honnecourt in about 1235, and studied extensively by Leonardo Da Vinci in the late 1400's.
$149.00 more info
It was invented in China, about 2600 years ago, and is one of the most precise machines in ancient history. It is a non-magnetic compass, and the oldest example of differential gearing in the world.
$69.00 more info
This Easy Assembly Version of our popular Chinese South Pointing Chariot comes with many of the same features but has been re-engineered to reduce assembly time and increase accuracy of the mechanisms.
$49.00 more info