WW2 type LAG (Light Anti Gas) Respirator with postwar filter in WW2 bag mask postwar dated. The LAG was issued from 1943 with priority going to those who would take part in the invasion of Normandy, after the invasion they spread throughout the Army and continued in use after the war with a smaller diameter filter. VGC virtually unissued condition, rubber still supple.
Photo shows typical example.
WARNING: Respirators should NEVER be worn.