Sources & mentions in the video:
Label & strut pictures. And quite a collection:
1905 Montgomery Ward catalog:
Wollensak Junior info & 1903 catalog:
1912-1913 Wollensak Lens and Shutter Catalog:
Aperture, f-Stops, and the U.S. System:
What looks like a reflection at the bottom of the image is a note written on the back with a marker. It doesn’t show up on the paper but the scanner light brought it out on the image.