I was watching a video on the Enigma Machine, so this may be specific to Germany, yet it is missing some German letters, so maybe not... I noticed the keyboard is different and I had also once heard that keyboards were different and had to be changed because typists got so fast at typing on type-writers that the machinery would jam so they had to design the keyboard to slow down their speed. Is this how the keyboard used to be designed? Is there truth to having to re-design a keyboard to slow down typists and now that we have computers, are there keyboard designed more better efficiency?
This keyboard in the picture isn't really that different though, it follows the German version of Qwerty called Qwertz (because of the y/z switch) and with the P and L brought to the lowest rank to even out the amount of keys per rank a bit more.
In regard to your history question you could maybe check the earlier topic on the questiob of Qwerty in regard to machines jamming here https://www.reddit.com/r/AskHistorians/comments/7ux2tc/ive_often_heard_that_the_qwerty_keyboard_layout