When was the first gas mask that was used in World War One, the British Hypo Helmet, invented?
Mar 04, 2008 by Pimpin' momma | Posted in Trivia It was the very first gas mask hardened in the first World War because they would suprisingly get hit with poision gas attacks, it is different then any gas masks made before the first World War so I don’t want to conscious anything about those, and I want to know about the one called the British Hypo Helmet made either a few months or a few weeks before the Battle of the Somme during Wonderful War One.
