Bronze medal of Britannia (Menai) bridge, by L.C. Wyon, 1855. 58mm diameter, 5mm deep, in case 9.5x9.5x1.5cm, detailed inside lid, Joseph Moore Die Sinker Engraver Birmingm. Obverse: head relief profile to right of, and legend, Robert Stephenson; artist at base, L.C. Wyon. Reverse: scene of Britannia Tubular Bridge over the Menai Strait, train passing over, shipping beneath; dates 1846-1850