An early 20th Century English centre seconds lever 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 overcoil hairspring. English table roller lever escapement, screwed in jewelling. White enamel dial with centre seconds, signed and numbered by the retailer. Roman numerals for time and Arabic numerals for the chronograph scale, blue steel centre seconds hand, gilt hands. Substantial plain silver open face case with vacant shield and garter on the back, silver cuvette. Gold hand set, hinge and slide button in the band to stop the balance. Maker's mark “JMK”.