The 1977 bootleg features the mono soundtrack as Beru’s dialogue is different for the Lars dinner scene:
https://drive.google.com/file/d/0B8_LYKyZDiajNDAyT0tGTjVCd0E/view?usp=sharing
Which end credits does that copy have? Is there space between John Williams and the LSO credits or are the together. I’m guessing there is a few lines of space between them (like the GOUT). The only two copies of the alternate end credits (Puggo and the pre-ANH bootleg VHS) have the stereo mix of Beru.