A scan from a 1935 edition of Modern Mechanix documents this “typists’ gas-mask” whose clear face-plate allows typists to continue working while filtering out mustard gas and other airborne toxins.
(via We Make Money Not Art)
A scan from a 1935 edition of Modern Mechanix documents this “typists’ gas-mask” whose clear face-plate allows typists to continue working while filtering out mustard gas and other airborne toxins.
(via We Make Money Not Art)