Saw this ad recently in a German magazine. Degussa has showrooms in Munich, Berlin, Cologne, Hamburg, Stuttgart, and Frankfurt, where the company originated. They deal in gold and silver bars and coins. Metal refinery and bullion production are now handled by Swiss firms, but ingots still bear the Degussa insignia.
[update] I’ve since learned of the role Degussa played in handling chemicals and precious metal during the Second World War, discussed in Peter Hayes’s From Cooperation to Complicity: Degussa in the Third Reich (2004).