shortpitched713
Cricketer Of The Year
For those who aren't allergic to nuance and context, here's an article on the history of measuring speed in baseball, and why some radar guns were more accurate/faster than others.
www.baseballamerica.com
One thing to keep in mind is that baseball pitches are all thrown at roughly the same angle to the ground as well, unlike cricket deliveries, so that adds another area of variance and uncertainty to measurements from older style guns measuring speed further out from the point of release. And also corroborates @Line and Length 's anecdote of Thompson making it easier for himself by gaming the gun with full tosses.
I hate to say those 1979 measures look even more unreliable still, knowing these pieces of information. They quite probably can't even be used to measure different bowlers against each other who all did the same test, due to the way different angle deliveries lose more/less speed. A cricket radar gun which doesn't measure out of the hand seems next to useless.

The Measure Of A Fastball Has Changed Over The Years
Where velocity is recorded on the journey from the mound to home plate makes all the difference. Take Aroldis Chapman, for example.

One thing to keep in mind is that baseball pitches are all thrown at roughly the same angle to the ground as well, unlike cricket deliveries, so that adds another area of variance and uncertainty to measurements from older style guns measuring speed further out from the point of release. And also corroborates @Line and Length 's anecdote of Thompson making it easier for himself by gaming the gun with full tosses.
I hate to say those 1979 measures look even more unreliable still, knowing these pieces of information. They quite probably can't even be used to measure different bowlers against each other who all did the same test, due to the way different angle deliveries lose more/less speed. A cricket radar gun which doesn't measure out of the hand seems next to useless.