The Vintage Wrist Watch Company has dated this piece to the 1910s.
Each chain measures 21cm long including the T-bar and the clasp.

The chain comes with a rifle shooting fob which measures approximately 2.5cm x 3cm. It is hallmarked for Birmingham 1935 and a maker’s mark for J A Restall, also from Birmingham.
Total weight 64.6g.
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The Vintage Wrist Watch Company has dated this piece to the 1910s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page