Yes, I think Equijet might be able to provide some insight into the frame as he owns the Edberg Classic PS 6.1 85 and the Graf PS 7.0 85.
I'm just speculating here but some specs look to be:
-85 square inches head size
-18 x 20 string pattern
-22 mm beam width
-27 inches length
Love to get the measurements on your prototype when you get back. Enjoy your vacation!