Etched under the surface.
"The Swan Bells Tower" houses a set of eighteen bells hanging in a specially built 82.5 metres (271 ft) high copper and glass campanile in Perth, Western Australia. Taking their name from the Swan River, which the tower overlooks, and forming a sixteen-bell peal with two extra chromatic notes, are one of the largest sets of change ringing bells in the world.
Twelve of the set are historic bells from St Martin-in-the-Fields church in Trafalgar Square in London; six others, cast in recent times by the Whitechapel Bell Foundry. The St Martin-in-the-Fields bells were donated to the State of Western Australia as part of the 1988 Australian bicentenary celebrations; the additional bells were cast with a subsequent donation of metals mined in Western Australia. The six newer bells include five which were presented to the University of Western Australia, the City of Perth and to the people of Western Australia from the City of London, the City of Westminster and a consortium of British and Australian mining companies, and one bell commissioned by the Western Australian Government (Wikipedia).