Section 18 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof 91 Clocks and watches and parts thereof 91 01 Wristwatches, pocket-watches and other watches, including stopwatches, with case of precious metal or of metal clad with precious metal 91 01 19 - - Other Commodity Code Description 91 01 19 00 - - Other