| Naics index | Naics index description |
|---|---|
| 334519 | Ceilometers manufacturing |
| 334519 | Chains, surveyor's, manufacturing |
| 334519 | Chronographs manufacturing |
| 334519 | Chronometers manufacturing |
| 334519 | Clock materials and parts (except crystals) manufacturing |
| 334519 | Clock or watch springs, precision, made from purchased wire |
| 334519 | Clocks assembling |
| 334519 | Clocks assembling from purchased components |
| 334519 | Commercial timing mechanisms manufacturing |
| 334519 | Compasses, portable magnetic-type, manufacturing |