9111.20.40.00 - Other

This HTS code encompasses watch cases that are not gold- or silver-plated and are manufactured from base metals. This includes a wide range of common metals such as stainless steel, brass, aluminum, and alloys thereof. The essential characteristic for classification under this code is the absence of precious metal plating, distinguishing it from its sibling category.

The distinction from sibling category 9111.20.20.00 is crucial. While both are watch cases made of base metal, the latter specifically denotes those that have undergone a plating process with gold or silver, thereby altering their material composition and value. This sub-category, 9111.20.40.00, therefore, captures unplated base metal watch cases.

As this is a leaf node, there are no further subdivisions. Classification within this category is determined by the material of the case (base metal) and the absence of gold or silver plating, aligning with the broader scope of "Cases of base metal, whether or not gold- or silver-plated" under Chapter 91.