Antique rose cut diamond swallow bird brooch in silver on gold

Antique rose cut diamond swallow bird brooch in silver on gold. A flying swallow bird motif set throughout with fifty eight rose cut diamonds in silver grain settings and set to the eye with a round cabochon ruby, the tail feathers and wing ends feature incised decoration and the open beak is finished in polished gold, fitted to the reverse with a secure hinged pin and C-scroll.