![File:Leutnant Gustav Adolf Langanke testing a gas mask with a "Netzkopfhaube" LKp N101 helmet, most likely Russia, 1941. (25232550197).jpg - Wikimedia Commons File:Leutnant Gustav Adolf Langanke testing a gas mask with a "Netzkopfhaube" LKp N101 helmet, most likely Russia, 1941. (25232550197).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/0/06/Leutnant_Gustav_Adolf_Langanke_testing_a_gas_mask_with_a_%22Netzkopfhaube%22_LKp_N101_helmet%2C_most_likely_Russia%2C_1941._%2825232550197%29.jpg)
File:Leutnant Gustav Adolf Langanke testing a gas mask with a "Netzkopfhaube" LKp N101 helmet, most likely Russia, 1941. (25232550197).jpg - Wikimedia Commons
Wehrmacht and Luftwaffe gas mask box with mask, LS stamped, manufacturer and WaA, replacement lenses, embroidered
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