A collection of jewels

A collection of jewels, comprising: a silver and blue guilloché enamelled fob watch necklace, circa 1900, watch length 4.3cm, chain length 54cm, Swiss assay and British import hallmarks for silver; numbered 197212; a late 18th/early 19th century pear-shaped brooch set with foil-backed garnets, length 2.8cm, later brooch fitting; a star sapphire and half pearl cluster ring, size N1/2; a silver, cultured pearl and marcasite laurel wreath brooch; a garnet and half pearl cluster ring, size O, stamped 14K; a bicoloured 18ct gold rope twist watch chain, length 35cm; four enamel, mother of pearl and seed pearl buttons, each stamped 18K; three enamel and half pearl shirt studs; a pair of gilt metal and cultured pearl collar studs; and an additional pair of plain gold collar studs, each stamped 18, together with three cases, pearls untested