I remembered something about a reported problem with the 1st 200 g sqv classic pressing of who's next. did some searching and found what failed to paste here as a link, but you can at least cut & paste it and go to it:
http://www.stevehoffman.tv/forums/printthread.php?t=55439
besides the controversy it is interesting to note one poster preferring the classic to the orig uk track as follows
"I bought a second-pressing a few weeks ago. I haven't heard a first pressing (the Classic, that is), but I read all about the pressing problems many of you encountered. My copy is slightly dish-warped but sonically flawless: no distortion, no mistracking, no surface noise. The mastering is excellent. This copy is now my favorite, bettering my previous favorites (a UK Track original and a US Decca original)."
http://www.stevehoffman.tv/forums/printthread.php?t=55439