Hemmi 257 Bamboo Slide Rule from Mexico
The Hemmi 257 is a 10-inch bamboo slide rule with Mannheim and trigonometric scales for advanced engineering calculations. It qualifies under HTS 9017.20.4000 as a traditional mathematical calculating instrument valued for precision and collectibility. Crafted from laminated bamboo with metal cursor for durability.
Duty Rate — Mexico → United States
13.9%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Document bamboo lamination process and scale precision to distinguish from decorative wooden articles
• Collector's items require origin certificates; HTS classification unaffected by age but affects valuation
• Avoid classifying with protective cases; separate leather/metal cases go to Chapter 42