Received the following via email.
An extremely rare February, 1991 'in-process' view by Jack Smith of CR EMD SD50 #6707 sitting outside the shop in Altoona showing just the outline on the Fireman's-side flank of the future ribbon location, prior to the application of the yellow and black ribbon details. The second and third photos, taken by John Osciak and Dave Trenn, show the intended result, out on the main line and in Ashtabula (Ohio) Yard.
http://www.rrpicturearchives.net/showPicture.aspx?id=1092117
http://www.railpictures.net/viewphoto.php?id=91805&nseq=0
http://www.rrpicturearchives.net/showPicture.aspx?id=197394