An older example, probably from the late 1990s.
Pins are sleeved.
This design was also made with various other logos on the lid, mainly those of electrical appliance manufacturers.
The terminals are the style where the wire is wrapped around a post and a clamp screwed on from above.
Pins are identified with L N E, and the oval MK logo is positioned at the lower centre.
This style of plug is still manufactured, although the newer ones are made in Malaysia and the MK logo is the modern rectangular one.