I can't find that many of them, but I love the one's I've found...
More about...Studio: a brief history - http://www.studiointernational.com/about_studio.asp
Lots for sale here but pics have massive watermarks on them, but you can see more covers form the 60's and 70's http://www.vintagemagazinecompany.co.uk/710-studio-international
Studio was first published in April 1893 under the title The Studio: An Illustrated Magazine of Fine and Applied Art. It rapidly established itself as one of the most successful fine art periodicals in the English-speaking world. Among others, it featured the work of the illustrator Aubrey Beardsley – who even designed an elegant cover – and the architects Charles Rennie Mackintosh and CFA Voysey. It was one of the first art magazines to adopt photomechanical reproduction, a process that would dominate art publishing for a century.
Found at:
http://www.counter-print.co.uk/
http://www.intute.ac.uk/cgi-bin/fullrecord.pl?handle=20070605-181716
http://www.studio-international.co.uk/
http://www.leftmatrix.com/studiointer180.html
http://ahoylandahoy.blogspot.com/2009/05/layout-of-studio-international.html
Great legacy collection of the 'Fortune 500' covers from 1950's-1970's from Linda Robes collection: http://www.facebook.com/album.php?id=533064110&aid=161293&l=d34234f7e...
Adobe and Wired's concept work on a touchscreen magazine. Narrated by Jeremy and Wired Creative Director Scott Dadich, who led the tablet team.
"But what is already clear is that they offer the opportunity to be beautiful, highly engaging and immersive, going beyond what’s available on the web. I think tablets are going to sell like hotcakes, in part because they offer such an intimate, rich media experience. We’re betting big on them, as you can see, but this is just a taste."
Full article: http://www.wired.com/epicenter/2010/02/the-wired-ipad-app-a-video-demonstration/
"Canadian-Latvian literature magazine published around the world since 1950s. Experimental cover designs with national elements and style balancing between pseudo-amateur and highly professional creativity."
All here http://www.flickr.com/photos/baltdesign/sets/72157604393902404/
Today's glut of busily designed magazine covers could really learn from the 1950's Fortune Magazine styling. These issues would have jumped off the shelves no matter what the shelf competition - the boldness and controlled palettes are more than timeless.