9105.99 - Other:

This category, HTS code 9105.99, encompasses "other" clocks not specifically provided for under preceding subheadings within heading 9105. This heading generally covers clocks and watches, and this particular subheading acts as a residual category for such timekeeping devices. Crucially, it excludes electrically operated clocks, which are classified under the sibling category 9105.91.

The distinction between 9105.99 and its sibling lies in the power source and operating mechanism of the clock. While 9105.91 is exclusively for clocks that use electricity to function, 9105.99 is for clocks that operate by other means, such as mechanical (spring-driven or weight-driven) movements, or potentially other non-electrical power sources.

Within this residual category, further distinctions are made to refine classification. Subheadings exist to differentiate based on the physical dimensions of the movement, specifically if it measures "not over 50 mm in width or diameter." This metric is a key criterion for further subdivision, aiming to group clocks with similar internal movement sizes. Following this, a further "other" category allows for the classification of remaining items that do not fit the dimensional criteria, ensuring comprehensive coverage for all "other" non-electric clocks.