CHARLES IV (1788-1808). Carlos IV and María Luisa de Parma (Ae-silver. 8.83g / 53mm). 1789. Soria. Obverse test with metal circular frame. Unifaz. Engraver: A. Martínez. Anv: Acid busts of Carlos IV with jacket, jabot shirt, band, cloak and collar of the fleece, and of Queen María Luisa, with diadem and court dress, around the legend: CAROLUS IV ET ALOYSIA AUGUSTI. AU.