English Silver Centre Seconds Chronograph

A late 19^th Century English centre seconds chronograph in a silver open face case.  Gilt three quarter plate keyless movement with going barrel.  Plain cock with polished steel regulator, compensation balance with blue steel spiral hairspring.  English table roller lever escapement.  Signed and numbered white enamel dial with centre seconds, Roman numerals, blue steel seconds hand, gilt hands.   Substantial plain silver open face case with ribbed middle,  small gold slide in the band to stop the watch acting on the balance.  Vacant circular cartouche on the plain back, plain silver cuvette, gilt winding button, maker's mark "JR" in an oval and number corresponding to that on the movement.