Section 18 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof 90 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof 90 30 OSCILLOSCOPES, SPECTRUM ANALYSERS AND OTHER INSTRUMENTS AND APPARATUS FOR MEASURING O 90 30 40 Other instruments and apparatus specially designed for telecommunications 90 30 40 00 Other instruments and apparatus specially designed for telecommunications Commodity Code Description 90 30 40 00 000 Other instruments and apparatus specially designed for telecommunications