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 WALL CLOCKS Commodity Code Description 91 05 21 00 ELECTRICALLY OPERATED WALL CLOCKS