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 05 Other clocks 91 05 21 Electrically operated 91 05 21 00 Electrically operated Commodity Code Description 91 05 21 00 000 Electrically operated