The Vintage Wrist Watch Company has dated this piece to the 1890s.
Each of the link on the chain has the lion silver mark and one has the Frank Cole maker’s mark. The clasp is a later replacement.

There is also a shorter length of chain attached which accommodates a large silver fob with rose gold wash detail. The reverse of the fob is hallmarked for Birmingham 1904 with a maker’s mark for the Birmingham silversmith Thomas Skelton.
Total weight 67g.
The Vintage Wrist Watch Company has dated this piece to the 1890s.
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