An early 20th Century Swiss lever by Longines with unusual micrometer regulator in a gold full hunter case. Keyless gilt bar movement with going barrel. Plain cock with unusual polished steel micrometer regulator, the small geared pointer with its index on the adjoining plate. Compensation balance with blue steel overcoil hairspring, club foot lever escapement. Signed white enamel dial with subsidiary seconds, Roman and Arabic numerals, blue steel hands. Engine turned 14 carat full hunter case, signed cuvette with representations of medals and engraved “Grand Prix – Paris 1900”. Longines maker’s mark.