The closure system changed, adding a canvas pull strap for easier opening. The second model, used between 1935-36, is bit shorter at 25cm. On the inside of the lid, there is a separated section for the anti-fog inserts.įirst model Reichswehr and Wehrmacht canisters used between 1930-35 are around 26cm high with a diameter of around 12cm. The mask came in a round steel canister called Gasmaskenbüchse (gas mask canister). The most common filters from left to right: FE, S-Filter, FE 37, KF 455, FE 41, FE 42 and CO FE 39 Carrying canister The mask was made in 3 sizes 12% are large, size 1 masks Most, 80%, are size 2 and the rest 8% were the smallest size 3. The third variant has a valve house made of only one mould. (In the military, the modernization was easy, but not all the civilian ones were returned to be modified, resulting in some rare masks nowadays). The masks were retrofitted with the rubber protector and the pre-chamber lid. This update was implemented because the valve was soiled quickly and the soldiers hit their front teeth while falling. The second one is the most well-known one, where the exhale and the inhale are in one flat plain. The first model has a simple valve house with a slightly separated intake screw part. The mask mainly stayed the same throughout the years only the valve house changed. ![]() The 40 mm DIN intake is on the front, while the glimmer type exhale valve is behind it. ![]() Cellulose eyepieces are placed in brass assemblies, which are threaded, making eyepiece replacement rather easy. The face-piece itself is made from a thick canvas material coated in a thin layer of rubber, which is covered with a thin canvas layer and an even thinner rubber inner layer. The GM30 uses a 5-point head harness and an additional neck strap, made from cloth and elasticated by steelsprings.
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