1940s/50s Hughes-Owens Model 1771 Engineering Slide Ruler with Leather Case

C$95

The Hughes Owens Co Limited

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Item Description Item Specifics: • Brand: The Hughes Owens Co. Limited (Distributed) / Sun Hemmi (Manufactured) • Model: No. 1771 • Country of Manufacture: Japan • Material: Celluloid on Bamboo core • Era: Circa 1940s - 1950s • Included Items: Slide rule, original brown leather case Overview: Up for sale is a beautiful vintage Hughes-Owens Co. No. 1771 slide rule, precision-crafted in Japan by the legendary manufacturer Sun Hemmi. Known for their exceptional engineering, Hemmi slide rules feature a premium laminated bamboo core that resists warping, shrinking, and humidity, ensuring remarkably smooth action even decades later. This model features extensive conversion tables printed cleanly on the reverse side, making it a fantastic historical piece of engineering and mathematical history. Condition Notes: • Slide Rule: In good vintage condition. The scales are crisp and clear. The slide operates smoothly. • Cursor: The transparent cursor window is fully intact with no cracks. • Case: Includes the original stitched brown leather case. The leather shows light shelf wear consistent with age, and the stitching is fully intact.

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