I think the most amazing thing about the Bride material (heck, this is true for most of the major Universal material) is that 30 years ago, almost none of this was known to exist.
There was the one copy of the "E" style one-sheet (the red advance that Todd owns), but the other two styles were not known at the time, and no half-sheets were known, and only half as many inserts that we know about today.
Very similar stories for Dracula, Frankenstein, The Mummy, and the Invisible Man.