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 27 Instruments and apparatus for physical or chemical analysis, etc 90 27 81 Other instruments and apparatus: Commodity Code Description 90 27 81 00 Other instruments and apparatus:
