Swiss 18K gold minute repeating lever chronograph Circa 1912

Gold minute repeating chronograph 
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A Swiss 18 carat gold hunting cased minute repeating chronograph lever pocket watch with calendar and moon phase, hallmarked London (import) 1912. Gilt split three-quarter plate keyless movement with going barrel, plain cock with polished steel regulator, uncut balance with overcoil hairspring, club foot lever escapement, grained steel flyback chronograph work above the plates, push-button minute repeating on two steel gongs, visible regulator to the repeat train. White enamel dial with Roman numerals, flyback centre seconds chronograph, subsidiaries for the day, date, month and seconds combined with the moon phase below, blued steel seconds hands and gilt spade hands. Plain case, large push-button for the repeat and a small button for the chronograph in the band.
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Diameter: 59 mm
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Signed: No name
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It is unusual to find English assay import marks on this type of watch. The lids are also of a heavier gauge.