Original World War 2 business industry trade magazine vintage ad for THE LINDE AIR PRODUCTS COMPANY of New York City, NY.  Unit of Union Carbide and Carbon Corporation.  We Made a Synthetic Sapphire!  No sapphire is available for anything but war production.  In the future we stand ready to make ruby and other gem stone materials for the jewelry trade and for you.  Old 1943 WW2 era propaganda magazine advertisement.