One of our latest videos on YouTube is an exclusive look at what makes the Clock Tower (Big Ben) tick. Literally.

This is the pendulum bob for the Great Clock within Big Ben. The pendulum bob weighs 203 kg. The bob is made from concentric tubes of steel and zinc. Each period of the pendulum is 2 seconds. The total weight of the pendulum is 299 kg.

We’re working hard to get more video content on our YouTube channel, so keep an eye on it.