Arnold & Son

John Roger Arnold, London, John Roger Arnold, London A RARE GOLD OPEN-FACED RUBY CYLINDER WATCH WITH EARLY PREST PATENT KEYLESS WINDING1819, no. 3 gold diameter 42mm , •  Movement:  gilded full plate, ruby cylinder escapement, broad flat steel three-arm balance, ruby endstone, large blued steel regulation arm indicating on broad semi-circular scale engraved on going barrel bridge, signed Jno. R Arnold, London, No. 3 and marked patent • Dial: gold, Roman numerals against a stippled ground, outer pearled minute ring, engine-turned centre, gold hands, spade hour, the minute hand with pin hole to aid time setting • Case: gold case, engine-turned back, milled band, case hallmarked London 1819  and with  maker's mark TH in rectangular cameo for Thomas Hardy