Another vile plug covered in dirt.
Pins are unsleeved, there is a crack in the lid above the earth pin and a section missing from the side edge.
Flex grip is two flat bars fixed with two screws, the lid is secured with a third screw.
The interioe shows the original colour of this plug.
The lid has been sliced as was common with this style of plug - someone wired it and then realised they should have passed the flex through the lid first.