From Wikimedia.
This is not late 1830s style. Not the dress and not the coiffure. This could be an allegorical portrait.
Keywords: 1839, Krafft - Johann, Archduchess Clementina, Archduchess, Princess, Habsburg family, Borbone family, straight coiffure, braided knotted bun, partlet, high neckline, bodice, wrap, necklace