From eBay; entire upper edge fixed with Photoshop and sepia tone removed.
Sophie is dressed in simple civilian, not military-inspired, equestrian dress.
Keywords: Höppner, Sophia Charlotte of Oldenburg, Sophie Charlotte von Oldenburg, Prinzessin Eitel Friedrich, Princess Eitel-Fritz, Princess, Oldenburg family, Hohenzollern family, German, ribboned hat, blouse, high enclosing neckline, collar, jacket, collar, long close sleeves, buttons, close skirt, equestrian dress