Donald Hargrove was playing with a desktop calculator, which depending on the model, cost around $100 in 1974 (over $500 in 2019 dollars), which is why he wouldn't let anyone else touch it and was cradling it like a baby when it short circuited.
The truth of I.Q. tests is that they are not standardized. I.Q. tests are customized to a region of the world where the tests are taken. For example a test from the USA would be different than one taken in Australia.