Nolan Ryan was 100.9 across the plate in 1974, would have been 108.5 on the jugs gun at the time.
Dalkowski as a teammate told me the story at the time threw 93.5 across the plate , he was throwing on level ground too. he pitched the night before, and took him 40 minutes to throw one strike.
Basically it was a box used to time missles on and you had to throw a baseball through it to get a speed.
Bob Feller was clocked at 98.6 on it.
Dalkowski was clocked in the morning and Dalkowski was throwing with no sleep and he was drunk too when they clocked him.