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 29 REVOLUTION COUNTERS, PRODUCTION COUNTERS, TAXIMETERS, MILOMETERS, PEDOMETERS AND THE 90 29 20 SPEED INDICATORS AND TACHOMETERS; STROBOSCOPES Commodity Code Description 90 29 20 00 SPEED INDICATORS AND TACHOMETERS; STROBOSCOPES