A silver cased keywind open-faced gentleman's pocket watch, the gilt fusee movement with lever

A silver cased keywind open-faced gentleman's pocket watch, the gilt fusee movement with lever escapement, the unsigned backplate numbered '1789', gilt dust cover, the enamelled dial with black Roman numerals and subsidiary seconds, London 1887, case diameter 4.6cm, with a silver curblink watch Albert chain, fitted with a T-bar and base metal swivel, length of chain with T-bar 25cm.