The Vintage Wrist Watch Company has dated this piece to the 1930s.
The chain measures 25cm long including the T-bar and the clasp. Each link is around 8mm wide.
The T-bar is stamped Premosa SP, and the clasp is stamped SP too.
There is also a fob swivel, probably a little later in date than the chain.
The Vintage Wrist Watch Company has dated this piece to the 1930s.
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