It provides power to a radio like this one:
I don't know if you're aware of this, but those Calstan radios were made in the 1960's for use in schools. Calstan was a brand name used by Zenith (not affiliated with the U.S company of the same name). Their factory was in Sydney.
Radios like this are fine with 60c/s supply; the power transformers used in Australian valve radios are very conservatively rated.
