Julie Cartwright Antiques has dated this piece to the Edwardian era.
Hallmarks:
Makers 'marks: RC possibly Robert Carr.

Birmingham Assay mark.
Lion Passant.
Date letter "i" for 1908.
Dimensions:
Length: 23cm / 9 inches.
Condition:
Good.
Would make a wonderful addition to a hat pin collection.
Postage UK: £7 Special Delivery Next day.
Postage overseas: £8 International Signed For.
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Julie Cartwright Antiques has dated this piece to the Edwardian era.
You can view the stock and full dealer information on the Julie Cartwright Antiques Profile Page