Original World War 2 military industry trade magazine vintage ad for UNITED STATES STEEL.  The Gun That Sprang From Nowhere.  Somewhere this minute, as you read this, an enemy of America is looking tin to the barrel of a gun from nowhere.  A miracle gun that would still be a useless hunk of unshaped steel waiting to be machined except fore a discovery of scientists in a United States Steel laboratory.  Ad painted with the cooperation of the U.S. Marine Corps.  Old 1943 dated WW2 wartime era propaganda magazine advertisement.