cain spaans said:
will the original 1980 1.0 audio mix be in this one
There was no theatrical mono mix for this film (35mm stereo and 70mm surround were the two variants). However, there was an odd mono mix that existed, perhaps for television or some other post-theatrical distribution, that's on Puggo Strikes Back. AFAIK that ESB mono mix hasn't been synced to match this source (yet).