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 15 AND APPLIANCES, EXCLUDING COMPASSES; RANGEFINDERS. 90 15 90 PARTS AND ACCESSORIES FOR SURVEYING, HYDROGRAPHIC, OCEANOGRAPHIC ETC... 90 15 90 00 PARTS AND ACCESSORIES FOR SURVEYING, HYDROGRAPHIC, OCEANOGRAPHIC ETC... Commodity Code Description 90 15 90 00 000 PARTS AND ACCESSORIES FOR SURVEYING, HYDROGRAPHIC, OCEANOGRAPHIC ETC...