I have acquired a desk that was supposedly a prop in Superman the Movie, shot in Calgary, Alberta. I would like some way to authenticate if it's the original.
This page has some images (click to enlarge).
Here are some screenshots from movie-screencaps.com. You can see a front shot and a back shot, although the desk is covered in Lex's evil doings, including used orange paper cups.
Really the only details I can see are the edge trims.