Wow. I never knew about this. Here, here and here are some photos.
Just from the looks of it, I'm glad this version of Pyramid didn't make it to air. Woolery is of course a great game show host, but the whole set looks...simply different, and I wonder what the gameplay was like on this.
And what's up with the 6 people sitting in Pyramid squares instead of just a flip board like in Clark's version or electronic computers in Osmond's version?