Precious metals and their alloys and goods in precious metals or coated therewith, jewellery including bracelets, brooches, chains, charms, watch chains, tie clips, cuff links, earrings, gold and silver ware, gold thread, objects of imitation gold, hat ornaments, costume jewellery, key rings, medallions, necklaces, ornamental pins, pearls, pearls made of ambroid, rings, silver thread, trinkets, precious stones including opals, semi-precious stones, watches, watch bands, watch chains, watch and clock cases, clocks