| XVIII |  |  |  |  | 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 | 
 |  |  |  | 91081900 | Watch movements, complete and assembled, electrically operated, with combined opto-electronic and mechanical display, whether or not with dial and hands | 
 |  |  |  | 91082000 | Watch movements, complete and assembled, with automatic winding | 
 |  |  |  | 91089000 | Watch movements, complete and assembled, with hand winding only | 
 |  |  |  | 91091000 | Clock movements, complete and assembled, electrically operated (excl. watch movements) | 
 |  |  |  | 91099000 | Clock movements, complete and assembled (excl. electrically operated and watch movements) | 
 |  |  | 911011 |  | Complete watch movements, unassembled or partly assembled movement sets | 
 |  |  |  | 91101110 | Complete watch movements, unassembled or partly assembled "movement sets", with balance wheel and hairspring | 
 |  |  |  | 91101190 | Complete watch movements, unassembled or partly assembled "movement sets" (excl. with balance wheel and hairspring) | 
 |  |  |  | 91101200 | Incomplete watch movements, assembled | 
 |  |  |  | 91101900 | Rough clock movements | 
 |  |  |  | 91109000 | Complete, unassembled or partly assembled clock movements "movement sets"; incomplete clock movements, assembled (excl. rough clock movements and watch movements) | 
 |  |  |  | 91111000 | Cases for wrist-watches, pocket-watches and other watches of heading | 
 |  |  |  | 91112000 | Cases for wrist-watches, pocket-watches and other watches of heading | 
 |  |  |  | 91118000 | Cases for wrist-watches, pocket-watches and other watches of heading | 
 |  |  |  | 91119000 | Parts of cases for wrist-watches, pocket-watches and other watches of heading | 
 |  |  |  | 91122000 | Clock and watch cases (excl. for wrist-watches, pocket-watches and other watches of heading | 
 |  |  |  | 91129000 | Parts of clock and watch cases, n.e.s. (excl. for wrist-watches, pocket-watches and other watches of heading | 
 |  |  | 911310 |  | Watch straps, watch bands and watch bracelets, and parts thereof, of precious metal or of metal clad with precious metal, n.e.s. | 
 |  |  |  | 91131010 | Watch straps, watch bands and watch bracelets, and parts thereof, of precious metal, n.e.s. | 
 |  |  |  | 91131090 | Watch straps, watch bands and watch bracelets, and parts thereof, of metal clad with precious metal, n.e.s. | 
 |  |  |  | 91132000 | Watch straps, watch bands and watch bracelets, and parts thereof, of base metal, whether or not gold- or silver-plated, n.e.s. | 
 |  |  |  | 91139000 | Watch straps, watch bands and watch bracelets, and parts thereof, n.e.s. | 
 |  |  |  | 91143000 | Dials for clocks or watches | 
 |  |  |  | 91144000 | Plates and bridges for clocks or watches | 
 |  |  | 911490 |  | Clock or watch parts, n.e.s. | 
 |  |  |  | 91149010 | Springs for clocks or watches, incl. hairsprings |