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Amazon.com: WWI French Soldier & Dog Gas Mask 11x14 Silver Halide Photo Print: Photographs: Posters & Prints
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Four variations of what I believe to be U.S Dog Gas Masks, these would later be replaced by the M6-12-8 Dog Mask. Bottom right has the look of a Navy Diaphragm slightly. :
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Dog Handler In Gas Mask With Shepherd Dog Stock Photo - Download Image Now - Adult, Adults Only, Animal - iStock
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