This U.S. Census Bureau NAICS-based industry comprises establishments primarily engaged in manufacturing and/or assembling clocks; watches; timing mechanisms for clockwork operated devices; time clocks; time and date recording devices; and clock and watch parts (except crystals).

Cross-References. Establishments primarily engaged in--

• Manufacturing plastic crystals--are classified in U.S. Census Bureau NAICS-based industry 3261991, All Other Plastics Product Manufacturing;
• Manufacturing synthetic stones for gem stones and industrial use--are classified in U.S. Industry 327999, All Other Miscellaneous Nonmetallic Mineral Product Manufacturing.