Acu-Math Mannheim Slide Rule Model 400B Scientific Calculator Made in USA

Vintage Acu-Math Mannheim slide rule, a scientific calculator designed for precision and accuracy. This model 400B features a clear cursor for easy reading and precise calculations. Made in the USA, this slide rule is a testament to quality craftsmanship and enduring design. It includes multiple scales and markings for various mathematical functions, making it a versatile tool for students, engineers, and collectors alike. Keywords: Acu-Math, Mannheim, Slide Rule, Model 400B, Scientific Calculator, Vintage Calculator, Engineering Tool, Made in USA, Collectible, Math Tool, Analog Calculator, Vintage Slide Rule, Scientific Instrument