German WWII Iron Cross Inverted "10,000" What is the difference between the double S and the Imperial Eagle symbols and their significance?

The Iron Cross is the traditional symbol of the German army, the German army regarded it as a symbol of courage and honor, before the Second World War, for example, Hitler was in the German army in the First World War received an Iron Cross; and the word "Wan" is the Nazi flag designed by Hitler himself, symbolizing the Nazis, which symbolizes the whole of Germany. The double S and the Imperial Eagle were both unique to the Nazis in World War II, and their significance was mainly to boost morale, or to show off.