A collection of 4 Military World War I gas mask. Appears to be one from the US, one from Germany, A French and a British. US Military gas masks model C.E.M & canvas bag . The design was based off of the Small Box Respirator (SBR). Has original canvas bag with original accessories. British one is very similar and also includes canvas bag with some accessories. The German and French models have the original tin can containers that they would have come in. These are all original period gas mask, not reproductions. Given their age, they are very fragile and deteriorated. Would make great display pieces.