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 23 Instruments, apparatus and models designed for demonstrational purposes... Commodity Code Description 90 23 00 Instruments, apparatus and models, designed for demonstrational purposes, unsuitable for
