dating: 1820 provenance: Duchy of Lucca, To commemorate the marriage between Maria Theresa of Savoy and Carlo Ludovico, Prince of Lucca. On the obverse, necked busts (right). Opus: A. LAVY. On the reverse, busts facing each other of Charles Louis of Bourbon, Duke of Lucca and Maria Theresa, daughter of Victor Emmanuel I with the inscription 'CAROLVS LVDOVICO BORBONIVS / MARIA THERESIA SABAVDIA', below: FIDES MVTVA, bottom: MDCCCXX. diameter 4 cm.