The HPM D809/1 is an analog 24-hour mains power timer, which can be set to switch on/off device connected through it. In Australia, this can be purchased at local dick smith store or local Bunnings warehouse.
There are 3 triangular screws that hold this device together.
The circuit can’t be much simpler than this.
It contains a switch, a resistor, and a motor coil gear assembly.