Historically important English chronograph Circa 1901

Gold lever with carrousel and chronograph by S. Smith & Son
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An exceptionally rare and historically important English 18 carat gold hunting cased keyless lever pocket chronometer with anti magnetic twelve minute carrousel regulator made under licence to the design of Bahne Bonniksen, very early two button, four function chronograph, 12 hour progressive 60 minute registers and tachometer scale, Hallmarked London 1901. Class A Kew Certificate gained in 1901 with 74.2 marks. Frosted gilt 3/4 plate movement, jeweled to the centre, jewels mostly in screwed chatons, twelve minute carrousel platform also driving an additional seconds pinion, gold lateral counterpoised lever escapement and gold escape wheel, cut bimetallic compensation balance with gold temperature and platinum mean time screws, freesprung palladium double overcoiled balance spring with Phillips’ innner and outer terminal curves, diamond endstone in screwed chaton, Nicole Nielsen chronograph mechanism. White enamel dial by Willis with Roman numerals, outer minute divisions, seconds divided into fifths, outermost tachometer scale calibrated for miles per hour from quarter mile distances, subsidiary 12 hour and 60 minute register with Roman numerals and outer minute track, subsidiary seconds, original gold spade hands. Polished case by Samuel Smith, mastermark SS, double bezel, swivel anti theft pendant by G.J., five bar hinge, glazed gold rimmed cover to view the movement. Dial and movement signed and numbered, case with the same serial number.
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Diameter: 62 mm
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Signed: S. Smith & Son 9 Strand London