A 19th century gold and silver, rose-cut diamond bangle and a Russian gold watch chain

A 19th century gold and silver, rose-cut diamond bangle and a Russian gold watch chain
The hinged bangle of openwork triple knife-edge design with central closed-set rose-cut diamond cluster and rose-cut diamond line shoulders, circa 1890; and a Russian watch chain of fancy pierced gate-link design with faceted hinged ball locket fob, circa 1890, Russian marks (2)