The SM74 gas mask was designed for use by the military from 1974 through 1990 then it was handed over to the Civil Defence.
Mask overview Edit
The mask is a slightly updated version of the GM53 (updated GM53 also called SM74) it is made of butyl rubber which gives a great protection. The mask has two circular eye pieces that can be removed or replaced without the need for tools. The inhale walve is on the bottom and has an oral nasal cup. The exhale is on the front of the facepiece. It has a 5 point head harnes made of canvas straps.
The kit for the SM74 includes the mask, a filter, and a flexible corrugated hose, as well as a brown vinyl bag with two button snaps on the closing flap and an unusual strap system on the back.