I’ve seen this example lots of times.
It’s obviously a joke, but I didn’t know whether it was apocryphal or not.
Anyway, after much googling, it turns out that it was based on a dedication in a real book (1964) which did actually used the Oxford comma (or serial comma).
The second part (the Mandela bit) was tagged on later, and was based on a TV listing for a Peter Ustinov travel programme.
Lighthearted - How long do you display Birthday Cards?
He has done it! The toolmakers son has resigned!
