Glucydur Balance Spring for Chronograph Watches from Japan
Glucydur alloy balance spring optimized for high-frequency chronograph movements (4Hz operation). Classified in HTS 9114.90.34.00 as a hairspring for watch timekeeping regulation.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify balance wheel material compatibility in technical docs; alloy pairs affect classification
• Frequency certification (beats per hour) proves watch movement application
• Avoid generic 'spring' labeling; use 'hairspring for watch movements' explicitly