The Vintage Albert Nestler slide rule No 28, made in Germany, is a rare collectable for those interested in engineering and surveying tools. This slide rule, featuring a combination of metal, plastic, and wood materials, showcases the precision and quality craftsmanship of its time. The original case adds to the authenticity and value of this sought-after piece, making it a unique addition to any scientific collectables collection. One only. Box showing signs of wear commensurate with age. Photographs form part of the description. Thanks for looking.