The Vintage Wrist Watch Company has dated this piece to the 1880s.
This is the heaviest single silver chain we have ever seen at 246g.

The chain measures 16” / 41cm long including the T-bar and the clasp.
Also included is the Goliath fob, also hallmarked for 1898, so it has probably always been with the chain. The maker for the fob is J.W... it was usual for the fobs to be made by a different silversmith to the chain maker.
A very special item.
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The Vintage Wrist Watch Company has dated this piece to the 1880s.
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