This heading covers clocks (including alarm clocks but excluding clocks of heading 91.04) provided they are equipped with watch movements, and are essentially constructed for indicating the time of day. Under Chapter Note 3, the expression watch movements in this heading means devices regulated by a balance-wheel and hairspring, quartz crystal or any other system capable of determining intervals of time, with a display or a system to which a mechanical display can be incorporated. Such watch movements shall not exceed 12 mm in thickness and 50 mm in width, length or diameter.
It should however be noted that the heading excludes :(a) Instrument panel clocks and clocks of a similar type, for vehicles, aircraft, spacecraft or vessels; these are classified in heading 91.04 regardless of the type or thickness of the movement. (b) Clocks (including alarm clocks) which do not satisfy the conditions specified in the first paragraph, for example, pendulum clocks, clocks with any other regulating system capable of determining intervals of time and exceeding 12 mm in thickness or exceeding 50 mm in width, length or diameter and clocks with movements without a regulating system (e.g., driven by synchronous motor). These fall in heading 91.05.
Alarm clocks are equipped with a striking mechanism (usually with the clock case acting as gong) which is set off at a given time of day fixed in advance by means of a special hand. The striking mechanism is sometimes replaced by a musical device.
Provided they have watch movements, the heading covers, inter alia : (ⅰ) Household or office clocks (including alarm clocks) on feet, on stands, etc. (ⅱ) Travelling clocks with cases. (ⅲ) Calendar clocks. (ⅳ) Eight-day clocks. (ⅴ) Clocks which strike the hours. (ⅵ) Clocks with luminous dials and hands.
The heading excludes the following when separately presented : movements (heading 91.08 or 91.10), clock cases (heading 91.12) and parts of movements (generally heading 91.10 or 91.14).
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