Here’s an interesting guide to Smith-Corona CHANGEABLE TYPE. And here’s some history of the inverted question and exclamation marks.
Bran-O-Rost (or Branorost) paper is still available and Brangs + Heinrich is still around too — although its headquarters is now in Germany, not Switzerland.
Thanks to the Rt. Rev. Munk, you can view the NOMDA samples for Hermes and Smith-Corona.
And if you don’t remember Sam Kinison . . .