HS CodesXVIII · Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof91 · Clocks and watches and parts thereof9107910700910700Chapter 91Copy pageTime switches, with clock or watch movement or with synchronous motorDescriptionTime switches, with clock or watch movement or with synchronous motorWas this page helpful?YesNoPrevious910690OtherNextWith mechanical display only or with a device to which a mechanical display can be incorporated910811