A late 19th century sapphire and diamond giardinetto brooch, French

A late 19th century sapphire and diamond giardinetto brooch, French
Designed as a floral and foliate knifewire arrangement, set throughout with circular-cut and pear-shaped sapphires, old brilliant and rose-cut diamonds, mounted in silver and gold, numbered, later brooch fitting with indistinct maker's mark and French assay mark, diamonds approx. 0.55ct total, length 3.0cm