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 10 Apparatus and equipment for photographic laboratories, nes 90 10 60 Projection screens 90 10 60 00 Projection screens Commodity Code Description 90 10 60 00 000 Projection screens