Original Item. Only One Available. The Navy Mark I was one of the earlier masks made by the United States, not to be confused with the later optical Mark I made in WWII. Similar to the German Gummischutzmaske, the Mark I was issued in a metal canister. However, unlike the German Gummischutzmaske, the Mark I used a wide rubber flapper type exhale valve that protruded from the filter inlet stem. The valve is now absent, stiffened and broken off long ago. 

This is an extremely scarce gas mask, only the second of this experimental type we have offered. Most resources will point to the date of manufacturing being around 1917-1918, around the same time as the C.E.M. The mask was designed to take the elements of the British Small Box Respirator and the German Gummischutzmaske and make a comfortable and mobile mask during the First World War. There is very little solid information known about this model due to its scarcity.

The mask is now heavily stiffened and cracking on the interior, so be prepared for residue to fall out.The front of the mask is stamped 2, likely the size. The hardened rubber valve on the side of the filter is now gone but the spot where it was mounted retains some of the rubber. These valves are almost always missing from the mask.

This example won’t fit onto a mannequin head due to the fragility, but it will still display well as an example of one of the rarest WWI gas masks!

A scarce example to find in any condition, ready for further research and display!