9101.29.10 - Having no jewels or only one jewel in the movement

This HTS code, 9101.29.10, specifically classifies wrist watches with cases made of precious metal or metal clad with precious metal, which also incorporate a stop watch function. The defining characteristic for this subcategory is that the watch's movement contains no jewels or only a single jewel. This jewel, often a synthetic ruby or sapphire, serves to reduce friction at key pivot points within the watch mechanism, enhancing accuracy and longevity.

It is crucial to distinguish this category from its siblings based on the jewel count within the movement. Unlike 9101.29.20 which covers watches with over one but not more than seven jewels, or the subsequent categories for movements with over 7 or over 17 jewels, this classification is strictly for those with minimal to no jeweling. The presence of more than one jewel would necessitate classification under a different, more detailed subcategory.

As this is a leaf node within the HTS, there are no further subdivisions under 9101.29.10. Therefore, classification within this code is definitive once the criteria of a precious metal or clad case, a stop watch function, and the absence of or presence of only one jewel in the movement are met. Examples of such watches would be high-end timepieces designed for precision timing where cost considerations might have limited the extent of jeweling.