Inspired by the Shakespearean play, “The Tempest”, the engraved wording on the side reads Ferdinand & Ariel E W Wyon. Dest. & Sculpt' Published 1st October 1849 The plaque measures 18.5cms in diameter & weighs approx 185 grams, some surface wear to the flat areas as per photo’s, metal is most likely pressed Bronze. A most interesting & quality piece !!