This chapter includes clocks, watches, and parts thereof but excludes:
- Clock or watch glasses or weights classified by their material.
- Watch chains in heading 7113 or 7117.
- Bearing balls in headings 7326 or 8482.
- Articles of heading 8412 that work without an escapement.
- Articles of chapter 85 not yet assembled into watch or clock movements.
Specific definitions include:
- "Watch movements" should be devices less than 12 mm thick or 50 mm in any one dimension.
- Heading 9101 covers watches with cases of precious or semi-precious materials. Watches with base metal inlaid fall under 9102.