Sorry, know this appeals to only a select few on here.
About two years ago there was some discussion on the ol' DY about whether there were any United Artists Building and/or theater postcards from the 1920s. I finally tracked one down. Shows only the office tower and not the marquee, unfortunately. Will post it on my site under the United Artists postcard section in a few minutes.
http://buildingsofdetroit.com/places/ua/postcards