British 800 Silver Dionysus God/Goddess Pendant Brooch with Blue Topaz

Antique pendant brooch that was cast in 800 silver. It is British and has a full set of hallmarks on the back. The casting is extremely detailed and fine. There are four faceted blue topaz stones hanging from the grapes. The pin that holds the pin in place looks to be replaced and may not be perfect. Clasp is a non-locking clasp. There are two bails on the back of the piece so that it will hang straight on the chain. 

Measures 2 3/8" wide by 1 5/8" tall. Weight: 27.8 grams.