1980 - Anatomy of a Cover - Iron Man #133

http://www.comicartfans.com/gallerypiece.asp?piece=626239&gsub=32158

And here's an unpublished cover:

http://www.romitaman.com/GalleryPiece.asp?Piece=17193&ArtistId=1115

And here's the published version:

And lastly, here's the digitally recoloured version: