Wonders of the internet

My son James just asked me (in our quartz world) if London's Big Ben needed winding. Within a few seconds via Google I had an actual picture of the Mr. Smith winding it up.
The large size of the movement makes it very accurate. There is a system whereby a penny is added as a weight to change the accuracy and it adds 2/5ths of a second every 24 hours. Not bad.
This I've added simply because it's a cool constructivist-like image of part of the clock: