The Vintage Wrist Watch Company has dated this piece to the 1910s.
Each of the links has the lion silver mark, and one has the Constantine & Floyd maker’s mark so we can be sure all the components of the chain are original to each other. Each chain measures 23cm long including the T-bar and the clasp.

The chain comes with a silver vesta case which is hallmarked for Birmingham 1901 with a maker’s mark for Samuel Levi. The vesta measures 33mm wide and 52mm high. The vesta has a gilt interior, a nice sign of quality.
Total weight 85g.
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