Mainspring for Automatic Skeleton Watches
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If specifically identified as 'main springs' rather than general springs
HTS structure separates mainsprings (9114.90.70) from other springs like hairsprings (9114.90.38).
If bulk springs for general mechanical applications
Base metal articles of general use (note 1(c)) classify in heading 7326, not watch-specific parts.
If for electric motor applications beyond watches
Multi-use springs suitable for chapter 85 motors fall outside chapter 91 per note 4.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• 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
Related Products under HTS 9114.90.38.00
Nivarox Hairspring for Mechanical Watches
A Nivarox alloy hairspring designed for mechanical watch movements, regulating the oscillation of the balance wheel to maintain accurate timekeeping. It falls under HTS 9114.90.38.00 as an 'other' spring specifically for clock or watch use, distinct from general use parts excluded by chapter notes.
Balance Spring for Quartz-Analog Watch Movements
A hairspring component for quartz-regulated watch movements with mechanical display, ensuring precise time intervals as defined in chapter note 3. Classified under HTS 9114.90.38.00 as 'other' watch springs, separate from unassembled chapter 85 parts.
Incabloc Shock-Protected Hairspring
A shock-resistant hairspring with Incabloc mounting system for luxury mechanical watches, regulating balance wheel oscillations. Falls under HTS 9114.90.38.00 as specialized 'other' watch springs for precise timekeeping.
Breguet Overcoil Hairspring
Traditional Breguet-style overcoil hairspring for high-end chronometer movements, improving isochronism in mechanical watches. Classified in HTS 9114.90.38.00 as 'other' precision watch springs per chapter definitions.
Flat Hairspring for Vintage Pocket Watch Restoration
Traditional flat hairspring for restoring antique mechanical pocket watches, fitting movements under 50mm diameter limit. HTS 9114.90.38.00 covers such 'other' springs as clock/watch parts despite restoration context.
Silicon Hairspring for Modern Diver's Watches
Anti-magnetic silicon hairspring for professional diver's watches, offering corrosion resistance and stability. Falls under HTS 9114.90.38.00 as innovative 'other' watch spring technology for timekeeping regulation.