This vintage slide ruler is a rare find for collectors of engineering and science memorabilia. Made in Germany by A.W. Faber Castell, it features a tachymeter function and comes with its original case. The ruler has not been modified from its original design. Perfect for enthusiasts of slide rules or those interested in vintage scientific tools, this item is a must-have for your collection. Its country of origin and original manufacture details make it a unique addition. Don't miss out on the opportunity to own this piece of history.