| XVII |  |  |  |  | vehicles, aircraft, vessels and associated transport equipment | 
|  | 87 |  |  |  | vehicles other than railway or tramway rolling stock, and parts and accessories thereof | 
|  |  | 8701 |  |  | Tractors (other than tractors of heading | 
|  |  |  | 870123 |  | Road tractors for semi-trailers, with both spark-ignition internal combustion piston engine and electric motor as motors for propulsion | 
|  |  |  |  | 87012390 | Road tractors for semi-trailers, with both spark-ignition internal combustion piston engine and electric motor as motors for propulsion, used | 
|  |  |  | 870124 |  | Road tractors for semi-trailers, with only electric motor for propulsion | 
|  |  |  |  | 87012410 | Road tractors for semi-trailers, with only electric motor for propulsion, new | 
|  |  |  |  | 87012490 | Road tractors for semi-trailers, with only electric motor for propulsion, used | 
| 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 | 
|  |  | 9101 |  |  | Wrist-watches, pocket-watches and other watches, incl. stop-watches, with case of precious metal or of metal clad with precious metal (excl. with backs made of steel) | 
|  |  |  |  | 91011100 | Wrist-watches of precious metal or of metal clad with precious metal, whether or not incorporating a stop-watch facility, electrically operated, with mechanical display only (excl. with backs made of steel) | 
|  |  |  |  | 91011900 | Wrist-watches of precious metal or of metal clad with precious metal, whether or not incorporating a stop-watch facility, electrically operated, with opto-electronic display and with combined mechanical and opto-electronic display (excl. with backs made of steel) | 
|  |  |  |  | 91019100 | Pocket-watches and the like, incl. stop-watches, of precious metal or of metal clad with precious metal, electrically operated (excl. with backs made of steel and wrist-watches) | 
|  |  |  |  | 91021100 | Wrist-watches, whether or not incorporating a stop-watch facility, electrically operated, with mechanical display only (excl. of precious metal or of metal clad with precious metal) | 
|  |  |  |  | 91021200 | Wrist-watches, whether or not incorporating a stop-watch facility, electrically operated, with opto-electronic display only (excl. of precious metal or of metal clad with precious metal) | 
|  |  |  |  | 91021900 | Wrist-watches, whether or not incorporating a stop-watch facility, electrically operated, with combined mechanical and opto-electronic display (excl. of precious metal or of metal clad with precious metal) | 
|  |  |  |  | 91029100 | Pocket-watches and the like, incl. stop-watches, electrically operated (excl. of precious metal or of metal clad with precious metal) | 
|  |  |  |  | 91031000 | Clocks with watch movements, electrically operated (excl. wrist-watches, pocket-watches and other watches of heading | 
|  |  |  |  | 91039000 | Clocks with watch movements (excl. electrically operated, wrist-watches, pocket-watches and other watches of heading | 
|  |  |  |  | 91051100 | Alarm clocks, electrically operated | 
|  |  |  |  | 91051900 | Alarm clocks (excl. electrically operated) | 
|  |  |  |  | 91052100 | Wall clocks, electrically operated | 
|  |  |  |  | 91052900 | Wall clocks (excl. electrically operated) | 
|  |  |  |  | 91059100 | Clocks, electrically operated (excl. wrist-watches, pocket-watches and other watches of heading | 
|  |  |  |  | 91059900 | Clocks (excl. electrically operated, wrist-watches, pocket-watches and other watches of heading | 
|  |  |  |  | 91081100 | Watch movements, complete and assembled, electrically operated, with mechanical display only or with a device to which a mechanical display can be incorporated | 
|  |  |  |  | 91081200 | Watch movements, complete and assembled, electrically operated, with opto-electronic display only | 
|  |  |  |  | 91081900 | Watch movements, complete and assembled, electrically operated, with combined opto-electronic and mechanical display, whether or not with dial and hands | 
|  |  |  |  | 91091000 | Clock movements, complete and assembled, electrically operated (excl. watch movements) | 
|  |  |  |  | 91099000 | Clock movements, complete and assembled (excl. electrically operated and watch movements) |