In the past few years, we have covered plenty of rad clocks here. The Horolovar Ignatz Clock is also worth a look. It is a novelty clock with a flying pendulum escapement mechanism. It has a small metal ball connected to a string that wraps around one post before unwinding and repeating the process on the other.
These clocks were not known for being awfully accurate but they do put on a show as time goes by.