In reply to Mark:
To confirm what other people have said, the gallery window is not at the EigerWand station, but some distance along the railway line before it. It's on the right hand side of the wall, shortly before the Hintertoisser traverse, wheras the staion is up on the left hand side and well away from the 1938 route.
And not only did the window feature in the Eiger Sanction, but the scenes where Clint Eastwood has to cut his rope (whilst dangling outside of the window) was actually filmed on the wall. No stunt double, no clever special effects wizardy. Takes some guts in my view.