Makes you wonder how they made superb lenses in the 30s without modern tecknology....
Well, first off, the production volumes of the 30s were much, much smaller than they are today.
Second, given enough time and meticulous effort, you can get pretty far with manual labour.
Third, were the lenses of the 30s as good as those in this lens?
I was surprised to see the amount of manual labour used in the production of the lens; I'd have thought there would be more automation and additional semi-automated quality control checks earlier in the process.