Step back into the golden age of engineering with this fantastic estate find of two vintage Mid-Century professional slide rules.

Before the digital calculator, these precision analog instruments built the modern world. This curated lot features two high-quality, professional-grade duplex slide rules complete with their original heavy-duty leather cases. Perfect for STEM collectors, mathematicians, history buffs, or as a striking industrial display piece for an office desk.

Included in this Set:

Frederick Post Co. Versalog Model 1460 (Maroon Case):
A legendary 12-inch engineering slide rule featuring a laminated bamboo core, dual-sided scale graphics, and its original clear glass indicator cursor. Made in Japan by Sun Hemmi, the Versalog is widely celebrated by collectors as one of the best general engineering slide rules ever constructed. Housed in its premium deep-maroon leather case featuring a built-in belt loop strap.

Vintage Keuffel & Esser (K&E) Polyphase Duplex Trig (Model 4070-3):
A professional-grade, 10-inch celluloid-faced mahogany analog slide rule manufactured in the USA between 1954 and 1962. This classic calculation instrument features a dual-sided duplex scale system layout specifically tailored for trigonometric calculations. It retains its original clear glass indicator slide and is accompanied by its custom tan leather belt case boldly personalized with the name "EBMEIER".