Sovereign Antiques Of Nuneaton has dated this piece to the 1870s.
Top quality watch, good condition.
Movement-
Good quality, Fusee chronograph movement. Good clean condition. Key wound (supplied)

Good working order. Quality movement. Gains 5mins over 24 hour bench test.
The stop/start button works well.
Case-
54mm diameter
Heavy weight Solid silver with Chester hallmarks dated early 1879
Good clean condition, typical ageing as to be expected with age. A few small dints and very light scratches visible on back.

Nice engraving on back.
Front door hinges good condition with no over opening. Outer back door has very slight over opening, inner door is fine.
Dial-
White enamel dial in good condition.
Crystal-
Mineral glass good condition
Overall top quality fusee chronograph in good condition and a great runner.
Sovereign Antiques Of Nuneaton has dated this piece to the 1870s.
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