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 40 Plates and bridges 91 14 40 00 Plates and bridges Commodity Code Description 91 14 40 00 000 Plates and bridges
