NOTE: Aoxomoxoa was remixed and reissued in late 1971 with slightly altered back cover
with arrowhead logo replacing W7 logo and additional info at bottom of cover.
Most remixed copies carry "RE 1" somewhere on the label.
Just a clarification of sorts, I suppose: I have an earlier Terre Haute pressing on the Seven Arts label with the RE1 in the matrix and it's definintely the original mix. So while "Most remixed copies carry "RE 1" somewhere on the label" may be true, not all RE1s are the re-mix.
Although I am not much of a Grateful Dead fan, I found an article in faroutmagazine regarding the remixing and rereleasing of this LP to be quite interesting. Below is a brief excerpt from that article. It makes it sound like two significantly different albums for both Anthem Of The Sun" and "Aoxomoxoa" were available in the early 1970's.
"Jerry Garcia and Phil Lesh decided that the dense arrangements and unorthodox instrumentations were no longer representative of the band, and so they set forth to remix both Anthem of the Sun and Aoxomoxoa to remove some of the more explicitly psychedelic elements.
Aoxomoxoa was first, and the pair stripped away the avant-garde noises in ‘What’s Become of the Baby’, the backing choir on ‘Mountains of the Moon’, and the a cappella ending of ‘Doin That Rag’. They also made edits to some of the runtimes and lengths of songs, with songs like ‘China Cat Sunflower’ being cut down to be shorter. Anthem of the Sun received similar treatment, with certain live takes swapped out for alternative versions of songs."