A reporter wrote me on Flickr as I have a Sun Times specimen book from 1961. http://is.gd/ZVtD3X
The image is here http://twitpic.com/9bayzs
I'm pretty sure the sans face is Futura bold condensed, though the lower case "a" troubles me a bit. Although the Sun Times masthead resembles a number of faces I can't find an exact match.
Thanks for your help.