I have the Deluxe THX Boxed CAV format Laserdisc set of the the first 3 films. It's on 9 discs (18 sides, since LDs are double-sided). The very wordy official title is "Widescreen Collector's Edition Star Wars Trilogy, The Definitive Edition", whew!
Each disc is sleeved, and each group of 3 discs for a film has a bigger sleeve, and the whole thing is in a sturdy box that also contains a program book with some "making of" info about the disc set, plus all the chapter stop descriptions (LDs had chapter stops, but no on-disc menu system), plus the hardback book "George Lucas: The Creative Impulse".
According to that "making of" it was not made from a single print, but they used the best quality scenes from a variety of sources to create a new video transfer. To quote, "The result is a clean, consistent picture which is the closest possible to the original theatrical presentation." THX techs also remastered the entire soundtrack, using the original sound elements from Skywalker Ranch facilities, under the supervision of two of the sound engineers from the original films.
AFAIK, that's the closest to the original in a digital format that's ever been made available.