That was donated to a prison charity? Barking mad!
That is indeed a 1960-ish Hofner 500/5, the model which (in modified form) eventually became the best-selling Hofner President in the UK. The close-spaced 'toaster' pickups narrow the date range down quite nicely.
Your bass looks pretty much all original, although I'm not entirely convinced by the tort pickguard. It also appears to be in really lovely condition and should be worth somewhere into three figures.
The neck repair is absolutely typical of the 90s / noughties. Those basses were built using traditional techniques. The set neck was glued in using animal glues rather than modern epoxy and similar. Over the years/decades those animal glues will gradually dry out and turn to dust, at which point the neck will gracefully fold against the body like a well-oiled pen-knife.
Any number of well-intentioned but ignorant owners/luthiers tried to fix this by putting a bloody great woodscrew through the neck joint. Cheap as chips and very long-lasting, as long as you got the neck angle at the heel exactly right.
The correct solution is, of course, to re-glue the neck using animal glues.
After this amount of time (58 years) the original pickups may need re-winding and the original electrics may need re-soldering, though neither of those are inevitable. Given the short scale of that bass (30.5") I have no idea what has been done to have the strings look so weird, unless there's an issue with the tailpiece (not that I can see anything).
In terms of what's best for your charity, my recommendation would be to eBay the Hofner and use the funds raised either to buy five decent Squiers or to fund one complete rockband's worth of kit.