The Ml was adjusted from the head pad with the straps sewn to the facepiece tabs. The Mll was adjusted from the facepiece. The Ml facepiece also used two types of head harnesses. The only difference between the two is that the Ml-l-ll had a twenty 178 mm (7 inch) Mll hose and Mll carrier while the Ml-l-l used a 254 mm (10 inch) hose with Ml chest carrier. They were the (Ml-l-ll US Service gas mask) and the (Ml-l-l US Service Respirator). There were two types of army configurations. The mask was issued in five different sizes with the number on the forehead. In 1921 the Ml US Service gas mask was first issued. The mask was issued in five different sizes. This new mask was the experimental mask 1-1-2 and would be standardized in 1921 as the MI-I-II US Service gas mask. The final step was the facepiece being joined together at the chin. The rest of the hardware i.e lens crimpings was added afterwards. The facepiece was assembled using a flat sheet of brown gum rubber with a stockinette vulcanized onto the sheet rubber. These changes were with the angle tube assembly, the deflector system, and larger lens crimpings. The US Army ultimately decided to completely re-work the Model of 1919 Design changes. A new type of mask configuration was also being developed using a Model of 1919 facepiece with a 686 mm (27 inch) hose with an MI felt filter with this new carrier. This new type of carrier was meant for filters with inlet valves located on the top of the filter. In 1920 a new type of carrier was standardized known as the Model of 1920 Carrier or the MII. Towards the end of World War I the army was looking to improve upon the Model of 1919 gas mask. A flutter valve controlled outlet from the mask. The problem of lens fogging was reduced by directing the incoming air over the eyepieces. The Model of 1919 and the Akron Tissot masks eliminated the nose clip and mouthpiece of the WWI CE and RFK type box respirators. Bang for the buck is unbeatable.The Model of 1919 Gas Mask originated in World War I and was an improvement over the Akron Tissot masks. If you are that concerned with the perfection of your time warp experience, just get an original (yes they cost more) and quit acting like lunatic. Weenie Note 1- "in depth analysis": Several discriminating types have demanded metallurgical analyses, exact rib depth measurements, etc, etc. The bag may be secured to the can with any type of equipment straps- both mess tin and tornister types work fine. This works wonders in silencing the rattles. The gas sheet bag may be packed with either a gas sheet, or simply an old rag, hand towel, etc. The only visible differences from originals are that the ribs aren't quite as deep and the studs that retain the straps should be fieldgray instead of dull silver, but with a little wear & tear, they look real.įield use recommendation: From personal experience I recommend wearing a gas sheet bag on the canister (shown in the last photo.) By nature, these cans are noisy- they clank and rattle against the other gear and are constant source of noise pollution- which is highly undesirable in the field. These are the best of the reproduction gas mask cans available: the color is good, the welds are sturdy and the design is correct. Excellent quality copy of the WWII German Gas mask Carrying Can.
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