That's also one of the highest attendances in English football history. Only Man City bettered it at their own ground. Liverpool's record of 61,905 is pretty tame by comparison.
A lot of spectator sports were huge prior to WWII, bigger than they are now in terms of the live gate they could attract. This was an era when Charlton could get 40k or 50k for a match. As another example, this is the crowd for the Dempsey-Carpentier heavyweight title fight in 1921.
And here's a crowd gathered in Times Square just to listen to a bloke on a tannoy reading out updates of that fight!