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, PHOTOGRAGHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; MUSICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 90 10 NEGATOSCOPES; PROJECTION SCREENS. 90 10 50 OTH. APPARATUS & EQUIPMENT FOR PHOTOGRAPHIC LABORATORIES; NEGATOSCOPES Commodity Code Description 90 10 50 00 OTH. APPARATUS & EQUIPMENT FOR PHOTOGRAPHIC LABORATORIES; NEGATOSCOPES