Arnold & Son

A LARGE 18K YELLOW GOLD DUMB QUARTER REPEATING POCKET CHRONOMETER WITH ARNOLD SPRING DETENT ESCAPEMENT 1789 NO 9-61 yellow gold diameter 73 mm , • gilt full plate movement with Arnold spring detent escapement and early double S balance with gold helical spring, free sprung, signed John Arnold, London Invt. et Fecit No 9-61 • white enamel dial, roman numerals, outer arabic minute ring, large subsidiary seconds, signed John Arnold, London below XII • plain polished back engraved with monogram surmounted with a coronet ( possibly for the Earl of Mansfield ) • hallmarked for London 1789, case maker's mark WL (William Laithwait)