Congratulations! I haven't got the foggiest clue.
It has the same mark as the other '82 B2's so I would assume it is as it says in the title from the 1982 RR but beyond that, I have never seen that one that I can remember. Maybe an advance or there were some for non dubbed showings?
The matte finish is not surprising, most posters for the SW films had a gloss and matte version. The paper does look to be different than the normal to me from the pics.