Issued 1936-1945 (this one is dated March 6, 1940) The General Civilian Respirator was issued to every civilian by the government in the late 1930s and early 1940s. Civilians were legally required to have their gas masks within reach at all times, and there was an extensive propaganda campaign designed to increase awareness. This mask is very basic and does not even have an exhale valve. The air is breathed in through the filter and exhaled from the sides of the mask. Comes in original green stitched box with cloth. Located in Duncan