Gas rattle used by Lieutenant J T Colledge, 1918 (c).

Gas rattle used by Lieutenant J T Colledge, Royal Horse Guards, 1918 (c). Gas rattle, 1918 (c); wooden handle has a steel pin inserted into the top an may have been secured and stopped from rotating by a bolt pushed through the handle; upper and lower plates of the rattle are metal and hinged on to the spindle, either side of an eight points ratchet; all metal work is painted black and woodwork strained brown; owned by Lt J T Colledge, Royal Horse Guards, and probably used for warning of a gas attack, although such items were also used to simulate machine gun fire. The introduction of gas warfare on the Western Front in 1915 meant that rattles, horns and whistles were soon adopted as means of warning troops and giving them time to put on protective equipment during gas attacks.