English lever chronograph in a 18k gold case Circa 1905

Gold center seconds chronograph
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An English lever chronograph in a gold open-faced case, hallmarked Chester circa 1905. 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. White enamel dial with center seconds, Roman numerals, blue steel seconds hand and gilt hands. Plain 18-carat open face case made in one piece, the movement hinging out. Small gold slide in the band to stop the watch acting on the balance. Maker’s mark ‘BB’ in a rectangle and number corresponding to that on the movement.
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Diameter: 53 mm
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Signed: H. Ashton Stoke-on-Trent
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In excellent condition.