A special Streetcar named Desire!

I own a small one screen movie theater and I found this wall hanging in the back room of the theater. The picture appears to be a regular movie poster in a frame, but it is actually a poster image that is printed onto a harder board and mounted in a frame. I have scoured the internet and can't find ANY images that match this. My film booker said that it may be something that hung in the film company's office building but he wasn't sure. I think it is a very unique piece of movie memorabilia and I am trying to find out where it may have come from and made for!