This is the black rear trim panel that sits at base of rear window and has the two holes in the ends that the seat belt bolts go through..

Will fit all XJ6 series 3 cars and series 3 XJ12 cars made through 1992.

Came off of a 1987 Vanden Plas

Good used condition however it is by no means perfect as you know it is more than 30 years old.

Just clean it up and use it.