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 14 Other clock or watch parts 91 14 90 - - Clock parts Commodity Code Description 91 14 90 10 - - Clock parts 91 14 90 90 - - Watch parts