The Vintage Slide Rule Sans & Streiffe No. 311 is a collectible engineering tool manufactured in Japan. This slide rule comes with a Purdue Boilermakers leather case, adding a unique and nostalgic touch to the piece. Perfect for collectors of vintage slide rules or fans of the Purdue Boilermakers, this item is a rare find that combines practicality with a touch of retro charm. Shows its age from storage and moving over the years. The side of the case has an old sticker with the name David Bronnenberg on it. There is also writing on the inside of the flap with the same name. Works and slides as it should. Images are the exact case and rule you will receive. 

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