An ornamental chain, of various styles, attached to a man's pocket watch to safeguard it from loss and worn extended across a waistcoat (vest) to a watch-pocket, with the watch on one end and a watchcharm on the other end, and often with a seal, charm or watch key suspended from the centre of the chain.During the 18th century in England watch chains were often worn with attached suspended ornaments, such as a locket, seal or miniature portrait.
Watch Chain

Watch Chain
An ornamental chain, of various styles, attached to a man's pocket watch to safeguard it from loss and worn extended across a waistcoat (vest) to a watch-pocket, with the watch on one end and a watchcharm on the other end, and often with a seal, charm or watch key suspended from the centre of the chain.During the 18th century in England watch chains were often worn with attached suspended ornaments, such as a locket, seal or miniature portrait.
References
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson



