[Edited on 9/12/14 by JAG]
Yeah - a brilliant piece of Engineering. Cool that it's all mechanical too
[Edited on 9/12/14 by JAG]
absolutely amazing all mechanical. watched it 2 or 3 times and then so enthusiastic made my wife watch it too, even she was impressed by it 
Alas it's not quite as impressive as it seems 
Below the paper was a motion controlled magnetic system that traced the hand encoded drawing. The arm then moved to match the magnets and draw the
famous picture. In a couple of shots if you could pause and really study the frame you might see that the pen nib, at those points, 'is a ball
point and not an ink well pen,' comments Legato." So the automaton did do the drawings, but not based on its complex system of gears and
other clockwork visible inside it.