Re: .. never used .. ?
I still have both the yellow 1971 first edition and green 1974 second edition of the users guide, plus a library manual circa 1974/5, both much used(*). They're surprisingly small compared to modern language manuals.
I also (mostly) remember an evening's drinking with Ian Currie at a conference.
(*) To seriously get into greybeard one-upmanship, I also have a draft copy of the blue Smalltalk 80 book printed by Adele Goldberg on a Parc laser printer.