This type of power connector was extremely common in professional commercial equipment around the 1980's, particularly the broadcast industry but largely superseded by connectors such as the IEC320 however there is still vintage equipment using these and they can be very useful to have around.
AXR LNE-11 (2x recessed male pins plus earth pin)
Cannon
Manufactured in Australia
Rated at 250V AC 6A maximum
The other end of the cable is a standard Australian 240V 10A GPO male plug
1m length
Condition exactly as described