Some lovely Tuesday inspiration in the form of Gebrauchsgraphik: International Advertising Art covers. Gebrauchsgraphik or 'Commercial Arts' magazine was a German design and graphics publication founded in 1923 by Professor H. K. Frensel.
There are lots of examples of Gebrauchsgraphik covers on line, the ones above are from; A Journey Around My Skull, Webdesigner Depot, Bust Bright's Flickr, Aqua Velvet and Designers Books.
If Vintage magazine covers are your thing, you light like the following posts:
Country Fair and more Country Fair
Scienza e Vita