SECTION XVIII - OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; MUSICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF > CHAPTER 91 - CLOCKS AND WATCHES AND PARTS THEREOF > 9101 Wristwatches, pocket-watches and other watches, including stopwatches, with case of precious metal or of metal clad with precious metal > Wristwatches, electrically operated, whether or not incorporating a stopwatch facility > With mechanical display only