It looks like the Prado removed the oval frame from the portrait shown in the last image.
Posted to the Alexander palace Time Machine Discussion Forum by Mersan on 22 Septembber 2011.
María Josefa is seen to be wearing long puffed sleeves when the entire portrait is visible.
Keywords: 1820, López y Portaña, Queen María Josefa (1803-1829), Wittelsbach family, Borbón family, Princess, Queen, Spanish, hurluberlu coiffure, headdress, high neckline, neckline ruff, bows, epaulettes, long puffed sleeves, belt, natural high waistline, close skirt