This vintage slide rule is a classic piece from the Keuffel & Esser Co. It was manufactured in the United States and has the model number 4181-1. Measuring 7 inches in length, it comes with a stylish green leather pouch to keep it safe.

This slide rule is a great addition to any collection of engineering or scientific tools. It's perfect for those who love vintage items and want to have a piece of history in their possession. The slide rule is in excellent shape and will make a great gift for someone who appreciates the artistry and precision of vintage tools.

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Returns accepted, buyer pays all shipping fees.