From Pinterest search; enlarged by half. Also posted to Maria Luisa Gabriela de Savoia’s Subalbum here.
This dress is an early example of bows en échelle. The sleeves appear to have the required tube for the arm and an adjacent flap. The stomacher is framed by roll of lace that extends around her shoulders like a late 1500s ruff.
Keywords: María Luisa Gabriela, María Luisa Gabriela de Saboya, Maria Luisa di Savoia, principessa di Savoia, reina de España, Queen of Spain, Savoia family, Borbón family, Princess, Queen, curly coiffure, jeweled ribboned headdress, earrings, necklace, lace-edged chemise, square neckline, lace neckline ruff, fitted tabbed bodice, stomacher, jeweled bodice ornament, bows en échelle, lace revers, three quarter length full sleeves, lace flared cuffs, lace engageantes, full skirt, gloves, fan