This is a superb example of the  rare Wrenn W.6002.C "Carina" 1st Class Pullman in Brown/Cream issued by Wrenn, Basildon in late Period 4. Only 101 of these were issued between 1991-1992 before Basildon closure. It has the full B/B rosettes and White Tables. This is becoming as difficult to find today as the Limited Edition Evadne and Car 83. 

For those collectors/runners that collect the Wrenn Pullman variations, this is Brown/Cream factory sprayed over a maroon plastic body.

The Pullman comes in a  Period 4 box (cream cardboard interior) with cream coloured cardboard insert. The box has the full factory stamp on both  ends "W.6002C 1ST CLASS CAR CARINA" therefore I would place this as early 1992 issue.. 

The "Carina" Pullman/box  is "near mint to mint", for their age.