I was not there. I read the men who were.
A man who worked a bench in 1950 would be past ninety now, and I want to be plain about that because a lot of people writing about this period are not. What I do is read: trade manuals, state industrial arts courses of study from the 1930s and 1940s, apprentice handbooks, barbershop guides, maker's catalogues, the patent record back to 1790, and the household books that used to come free with a subscription.
So when this book says a thing, it is because a manual of the period said it, and I have tried to say which one and when. Where the sources disagree, I say that. Where a thing is simply not known, I say that too, which happens more often than you would think.
Not one brand name is recommended anywhere in this book. A make worth having now may be worth nothing by the time you read it, and the tool already in your shed is nearly always the one to learn on.