Found this brochure for the 1934 World’s Fair in Chicago at a local Antique Mall.
(Full sized images are ~5MB each, click on image to download)
During WW2, the fear of the Germans deploying gas weapons over London had hospitals protecting themselves and their patients, children included, with protective gas masks.
Source: Daily Sanctuary
7mm pistol fired at close range into an experimental vest.
The Snow Cruiser – Antarctic Expedition Research Foundation of Armour Institute of Technology Project No. 1-69