Vtg Pocket Slide Rule Nestler Darmstadt 0121; Instruction Sheet and Leather Case

The product is a RARE vintage Nestler Darmstadt Nr. 0121 pocket slide rule from Germany, complete with an Aristo Rietz instruction sheet and leather case. This collectible item would have been used in engineering and scientific applications in the 1930s-1960s, making it a rare and valuable piece for enthusiasts of slide rules and vintage technology.