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 11 Compound optical microscopes,incl. photomicrography,..... 90 11 90 Parts and accessories of compound optical microscopes 90 11 90 00 Parts and accessories of compound optical microscopes Commodity Code Description 90 11 90 00 000 Parts and accessories of compound optical microscopes