John Roger Arnold (1769 – 1843), John Arnold’s son served an apprenticeship with both his father and Abraham – Louis Breguet. From 1787 he and his father founded the company Arnold & Son which lasted until 1799.
As his father he excelled in making precision watches, but he used Earnshaw’s chronometer system instead of his father’s as it was easier to construct and as reliable. In 1792 he was sent by his father to Paris in order to be apprentice in Abraham – Louis Breguet’s workshop, but was forced to return to England when the Terror forced Breguet to exile in 1793.
After using his father Z-type balance for several years John Roger invents his own balance system, which will be called the U-Type. Also in 1820 he used John Prest’s patent for the keyless winding system which he applied successfully to his own watches.
After his father’s death in 1799, John Roger continued the business, taking into partnership John Dent between 1830 and 1840. He became Master of the Worshipful Company of Clockmakers in 1817. After his death in 1843 the company was bought by Charles Frodsham.
Antiquarian Horology 
