Treasure Trove Worcester Ltd has dated this piece to the 1900s.
The piece features a crowned lion and unicorn supporters, a central shield with quartered arms, and a lion passant atop the crown.

Crafted in sterling silver (marked "SILVER" to reverse), with a traditional pin and clasp fastening. The brooch is of good weight and quality, with lovely depth to the casting and enamel work.
Date: c. 1900–1930
Materials: Solid silver with enamel
Weight: 11.6 grams
Dimensions: 3 x 3.5 x 1 cm
Condition: Very good antique condition; some light surface wear and tarnish consistent with age, clasp working well.
Treasure Trove Worcester Ltd has dated this piece to the 1900s.
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You can view the stock and full dealer information on the Treasure Trove Worcester Ltd Profile Page