Section 18 OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; MUSICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 91 CLOCKS AND WATCHES AND PARTS THEREOF 91 10 ROUGH WATCH OR CLOCK MOVEMENTS. 91 10 12 INCOMPLETE MOVEMENTS, ASSEMBLED, OF WATCHES Commodity Code Description 91 10 12 00 INCOMPLETE MOVEMENTS, ASSEMBLED, OF WATCHES