Are you talking their averages then scaled with current averages? I thought IQ was averaged around 100. I'm on mobile with a spotty connection right now, so I can't look much up at the moment. I am doing well to reply on my fourth attempt.
SOme previous HN post about old intelligence test results, filed away for 60 years. Rescored, those people who took those tests long ago, had an average IQ of 70.