Here are a few examples of album covers put out by Decca Records back in the 1950s designed by Erik Nitsche, showcasing a plethora of classical superstars and symphonies. Very interesting to see such abstract design avenues taken to represent the music, Decca and Nitsche were obviously striving for something unique in the genre.
These images were scanned and posted on the Erik Nitsche Flickr stream, along with a goldmine of other historical artifacts created by the design pioneer. Well worth a look.