i replaced mine as part of the process of elimination when it was being a bad car,
these are the pics of mine (an early 1993 big turbo)
the finis is: 6728095
with this number printed on the bottom rh corner of the top: 93AG14A073BAA
It was about £200 from woodford about 2 years ago.

here are the pics of mine when i replaced it if they help....