Power Reserve Indicator Mainspring from Japan
Extended mainspring barrel for watches with 7+ day power reserve indicators, powering complex mechanical movements. HTS 9114.90.38.00 includes such high-capacity 'other' springs as essential watch parts.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Torque specifications and winding tests documentation prove watch movement functionality
• Distinguish from clock mainsprings (larger dimensions) that may classify under different clock headings
• For precious metal versions, exact plating thickness determines chapter 71 vs. 91 classification