λ A rose quartz, demantoid garnet and tortoiseshell parasol/walking stick handle

λ A rose quartz, demantoid garnet and tortoiseshell parasol/walking stick handle, late 19th/early 20th century, the handle of tortoiseshell, one end capped with a band of gold festoons on a ground of green guilloché enamel and a pommel of carved rose quartz inset with circular-cut demantoid garnets, length 32.1cm, Cyrillic assay mark, fitted case stamped Jo Vickery, Regent Street