content: The master blueprint for the Saturn V is intact and stored on microfiche. However, it's perfectly useless: they use a number of commodity parts that no longer exist and many of the bespoke part had modifications made by the manufacturer on what could be on a per-rocket basis(and may not have been written down at all in some cases). In both cases, critical information was never preserved in the first place because nobody considered it important. And they were probably right there: nobody was seriously considering a second production run of the Saturn V that the Apollo missions ran on; instead the plan was to create a Mk2 that would've had some major differences(eg, the removal of the iconic fins).