I mean the Workbench-disk (they are often numbered when distributed as files online, wich I don't like that's why I bought them, now I've screwed up and don't want to buy a whole new set when only one disk is overwritten).
The versionnumber is 370300-98 and I think it was sold from the year 1995. I don't know what amiga's they were meant for but probably the 4000, yes.