I have a set of disks that were originally printed as 6.0.6, but had a sticker put on them for 6.0.7. (And, obviously, contain 6.0.7.) The "Macintosh Basics" disk that came with it is still labeled 6.0.6, although it only has a System file, no Finder... (The set is from a Macintosh IIsi box.)

I do have one complete, and one one-disk-short 6.0.1 set, though. (Of course, the missing disk is "System Tools".)