AN AUSTRIAN IVORY AND SILVER MOUNTED CUP AND COVER, the ivory sleeve of cylindrical form carved in relief with a classical boar hunt, including figures of Diana and Hercules, with domed circular silver foot rising from the silver base, the silver cover of domed form with knopped finial, all with rich foliate decoration within shield-shaped lozenges, town mark of Vienna 179?, indistinct maker's mark possibly of Karl Gösswein (active 1792-1805), with later tax mark of 1806-7, late 18th or early 19th Century