13th Floor Elevators Winnie the Pooh Poster

Hi, Kiloh here. I just bought this 13th Floor Elevators Winnie the Pooh poster. It's pretty rough but it's my first "Pooh". For me, this is one of the ultimate Thirteenth Floor Elevators collectibles and one of the finest rock posters from the Sixties.

Does anybody know about restoring such a poster as this? I know it's pricey but... Should this poster be restored? Or should I leave it in its tattered glory?

One interesting piece of trivia is that one of the shows this poster promotes took place on my birthday. I was six years old.