Mainspring for Automatic Skeleton Watches from Canada
A power reserve mainspring for self-winding automatic watch movements, providing energy to the gear train. It qualifies under HTS 9114.90.38.00 as an 'other' clock/watch spring, explicitly including clock/watch springs despite general exclusion notes.
Duty Rate — Canada → United States
14.2%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include barrel assembly diagrams if imported with housing to distinguish from general metal parts in section XV
• Certify compatibility only with watch movements meeting size limits (note 3) to prevent chapter 85 misclassification