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 02 Wristwatches, pocket-watches and other watches, including stopwatches, other than those of heading 9101 Commodity Code Description 91 02 11 - - With mechanical display only 91 02 12 - - With opto-electronic display only 91 02 19 - - Other 91 02 21 - - With automatic winding 91 02 29 - - Other 91 02 91 - - Electrically operated 91 02 99 - - Other