This calculation slider, manufactured in Germany under the REISS brand and with the model number 3212, is a valuable addition to any collection. Its intricate design and functionality make it a must-have for those interested in engineering and science from the 1930s to now. The slider rule, also known as a slide rule, is a mechanical analog computer that can be used for multiplication, division, roots, and more. This particular slider rule is small in size and perfect for on-the-go calculations. With its unique features and origin in Germany, it is sure to be a prized possession for any collector or enthusiast.