Americas late entry into the war required a wide issue of equipment to her troops including the threat of gas attack having to be considered. This was a copy of the British Box Respirator & is very similar in appearance. Facepiece is of rubberised fabric with tan khaki hose & yellow US issue painted & numbered filter. The carrying haversack is complete with internal spring system & has string intact and has a two-popper flap, an adjustable strap and buckle and string around the outside. Inside and loose is a dull yellow tin containing an anti-dimming stick for gas masks, complete with instructions printed on the outside, and a small envelope containing instructions for use of the gas mask. The internal flap has ‘1087707’ & ‘S-18-23’ imprinted. The facepiece is good, the lenses have minor age-related cracking. The set is in overall good condition for a WWI piece and is a scarce piece of US Doughboy equipment. The price includes UK delivery. 22441:36