The Vintage Wrist Watch Company has dated this piece to the 1920s.
The chain measures 33cm long including the T-bar and the clasp.
The slightly misshapen T-bar is hallmarked for Birmingham 1895. There are silver marks on the chain. The clasp is hallmarked for 1922.

Also included is a silver fob with a rose gold wash shield to the front. The fob measures 30mm wide and 40mm high, and is hallmarked for 1908. There are no personal inscriptions on the fob.
Total weight 45g.
The Vintage Wrist Watch Company has dated this piece to the 1920s.
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