Here is my Spanish World War 2 gas mask that was produced around 1939, these masks look very similar to the German M-38 Gas mask. This mask was around $75 in American
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Antique French Army World War II C.P. 1935 M Gas Mask Good Condition | eBay
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Gas Mask - First World War" iPad Case & Skin for Sale by charlesdal | Redbubble