Gas alarm whistle, 1918 (c).

Gas alarm whistle, 1918 (c); double reed horn with double barrelled bells are made of brass and flare outwards from the mouthpiece; the barrels have incised lines where the bells insert into the socket; one is impressed, ‘D.R.G. M. / SIGNAL [with a lateral arrow through it]’; possibly made by J Hudson and Company. The introduction of gas warfare on the Western Front in 1915 meant that rattles, horns and whistles, such as this example made by J Hudson and Company, were soon adopted as means of warning troops. The devices gave soldiers time to put on protective equipment during gas attacks. Associated with World War One (1914-1918).