Section 18 OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION , MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; M USICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 90 Optical, photographic, cinematographic measuring, checking, precision, medical o 90 29 Revolution counters, production counters, taximeters, mileometers, pedometers an 90 29 10 90 29 10 00 Commodity Code Description 90 29 10 00 00 - Revolution counters, production counters, taximeters, mileometers, pedometers and the 90 29 20 00 00 - Speed indicators and tachometers; stroboscopes 90 29 90 00 00 - Parts and accessories