This picture shows a German pilot wearing on oxygen mask. It caught my eye because the oxygen mask makes the soldier look more skeletal in a way. Or rather, more like an alien, as it just doesn't look normal
Aviator's oxygen mask in position and ready to use. Note the handwritten caption on the photo. planes could not safely fly at ft, ceiling for deploying oxygen masks, so the development of the device looked at the future.
Russian Soviet pilot flight helmet ZSH-3+oxygen mask+leather helmet 4pcs in set
HELMET ZSH-3M Leather helmet Oxygen mask . LEATHER PILOT HELMET of soviet times. PILOT GOGGLES of soviet times PO-1M (ПО-1М). OXYGEN MASK KM-32. Helmet was made of genuine supple leather, natural fur inside. | eBay!
Design Tweaks for Better Living, or Putting On Your Oxygen Mask First...
Overkill at the "Into the grave"-festival 2017 in Leeuwarden. Could be the last time i saw them live given the health of Bobby Blitz. During songs he would get behind the cabinets and use an oxygen mask.