Original World War 2 aviation aircraft industry trade magazine vintage ad for WALTER KIDDIE AND COMPANY of Bloomfield, NJ.  Keeping a Man Alive at 35,000 feet.  Special lightweight cylinders and valves for high altitude flying were developed by Kidde, specialists in compressible gases. On airplanes, tanks, PT boats, ships, in factories.  Old 1943 WW2 wartime era propaganda magazine advertisement.