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Vintage SUN HEMMI Bamboo Slide Rule No. 251 Duplex Engineering Math Tool Japan
Overview

Step back into the golden age of engineering with this masterpiece from SUN HEMMI, the world-renowned Japanese pioneer of slide rules. The No. 251 is not just a calculation tool; it is a testament to the incredible precision and craftsmanship that supported global technological advancement before the dawn of the digital calculator.

Crafted from specially treated bamboo, this slide rule offers a legendary smooth sliding action and exceptional stability against humidity and temperature changes. For collectors and enthusiasts of mathematical history, this authentic Japanese-made instrument represents a time when complex calculations were performed with tactile elegance and focused intellect.

Features
Premium bamboo core construction provides superior durability and a smooth, consistent slide.
Comprehensive scale set including multiplication, division, trigonometry, square roots, and cube roots.
Equipped with a high-precision glass cursor for accurate reading of complex logarithmic scales.
Classic SUN HEMMI design, highly sought after by vintage scientific instrument collectors worldwide.
Condition
Shows age-related surface marks and dirt from previous use.
The scales remain clear and legible, maintaining its vintage character and functionality.
Included Items
Main Unit (Slide Rule)
Case (as shown in photos)
Size & Weight
Approx. Dimensions (H×W×D)
32 × 6 × 2.5 cm / 12.6 × 2.4 × 1.0 in
Approx. Weight
200 g / 0.44 lbs
Please Note
As this is a vintage item manufactured decades ago, it shows natural signs of age. Please review the photos carefully to understand its historic condition.
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Shipping
5-10 business days to ship
(excluding Saturdays, Sundays, and holidays)
All items are shipped with a tracking number for your peace of mind.
Shipping is available to your eBay registered address only.
Dispatch is available Monday to Friday only. Freight companies are closed on weekends.
We do not under-declare merchandise values or mark items as gifts, as required by Japanese and international customs regulations.
About Importer's Obligation

All orders ship from Japan. Customs declarations are completed accurately - we do not declare lower values or mark items as gifts.

1.For buyers in the United States
Customs duties are included in the item price. You do not need to pay any additional duties.
2.For buyers outside the United States
Import duties, taxes (VAT/GST), and other fees are not included in the item price or shipping cost. These charges are the buyer's responsibility.
3.Remote area deliveries
If your address is classified as a remote area, FedEx or DHL may apply a surcharge. We will contact you with the exact amount before shipping.

Thank you for your understanding.