Her genealogical sketch is here. She did not marry.
From eBay; sepia tone removed with Photoshop while cropping the margins.
Helmtrud wears a lace-trimmed fichu over a sheer over-dress with a high enclosing neckline over a dress with a high round neckline.
Keywords: Helmtrud of Bavaria, Princess, Wittelsbach family, German, straight coiffure, over-dress, high enclosing neckline, collar, three quarter length close sleeves, under-dress, high neckline, lace fichu, bows, close skirt, bracelets, fan