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 06 OR SYNCHRONOUS MOTOR (FOR EXAMPLE, TIME-REGISTER, TIME-RECORDERS). 91 06 10 TIME-REGISTERS; TIME-RECORDERS Commodity Code Description 91 06 10 00 TIME-REGISTERS; TIME-RECORDERS