The 2000 year old Mechanical Calculator from Greece

Fine mechanical devices like these were not known in Europe until recently. This unit is right out of the bronze age.

1. Antikythera mechanism - Wikipedia, the free encyclopedia
2. antikythera1-1 antikythera1-4
3. Gears from the Greeks
4. Gears from the Greeks
5. YAAS - Yet Another Antikythera Simulator YACS - installing the viewer