@chronografer - thanks for your scan. I scanned in my copy but only descreened it and left the contrast and sharpness alone.
The mysterious straight corridor from "Where No Man Has Gone Before":
Page 11 from "The Making of Star Trek". 1968. Copyright Stephen E Whitfield
Hey I just noticed something. I seem to have more "left of the photo" and you have more "right of the photo". My page cuts of the A frame while yours shows it in its entirety. Mine you can see the "Environment Engineering Personnel" sign but yours is cutoff.
Mind if I ask what edition print you have? My copy is the 22nd print from 1986.