Coat of arms of (the prince of) the Principality of Nassau-Orange (1702-1815) (German: Fürstentum Nassau-Oranien or Oranien-Nassau)
Own work, based on description in Geschichte des Nassauischen Wappens by Hermann Adrian Guenther von Goeckingk. Publisher: Görlitz, 1880
OSeveno, using modified elements by Heralder, Sodacan, Jimmy44. All respect goes to their talents.