The Vintage Wrist Watch Company has dated this piece to the 1920s.
The chain measures 30cm long including the T-bar and the clasp. The T-bar has the T*H mark for Thomas Hopwood, a Birmingham based chain maker.

Also included is a fob, 25mm wide, 37mm high including the fixed loop. The front of the medal has a raised image of rifles and target. The back of the medal is engraved, ‘SSRC, Junior Average, B Kent’.
Total weight 37g.
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