Discover the precision of the Keuffel & Esser Co. with this vintage 1900 slide ruler, a must-have for enthusiasts of engineering and mathematical history. Accompanied by its original box, this tool exemplifies the craftsmanship of an era where meticulous attention to detail was the standard. Ideal for collectors or those with a passion for scientific instruments, this slide ruler is a tangible piece of the past, showcasing the elegance of turn-of-the-century design. Whether for display or for use in historical education, it is a remarkable find that resonates with the legacy of engineering excellence.

The box is worn but the ruler is in good condition.