Log Log Duplex Trig Slide Rule from Japan
Advanced slide rule with log-log scales on both sides for exponential and trigonometric calculations in nuclear physics and rocketry. Under HTS 9017.20.4000 as a high-end mathematical instrument. Magnesium or ivory construction with multiple cursors.
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
• Scientific institution letters support classification for research-grade instruments
• Rare materials (ivory substitutes) require CITES-like documentation even for synthetics
• Avoid 'collectible' valuation; functional testing confirms instrument status