These are cogs or spockets, which are wheels with teeth or prongs. These cogs drive a clock, a time piece on display in the Swan Bell Tower.
It was a controversial project because of its cost and seemingly unimportant connection with W.A. The cost was $5.5 million, and now it seems so trivial. The then Court government commissioned the tower following a donation of twelve historic bells from St. Martin-in-the-Fileds church in London, six other bells from a London foundry, and the rest made from donated ore from W.A. mining companies. We finally got there some time back and enjoyed the bells and the display. It is one of the only West Australian millenium projects that came in one time, on budget, and still remains open, and makes a contribution to the community through education. I really learned a lot that day and thoroughly enjoyed the experience. Nothing like the wheels of time to stir the heart and mind.