dating: 1820-30 provenance: Duchy of Parma, Plaque of the Grand Cross made of diamond-like pierced silver. The center made of gold and red enamel. Marked 'No. 42 LEMAITRE RUE COQUILLIERE FABRIQUE D'ORDRESFRANCAIS ET ETRANGERS PARIS' on the back. Vertical pin and two side hooks. Of excellent manufacture. diameter 8.7 x 8.6 cm.