Description

A vintage slide rule featuring advanced log-log scales (LL1, LL2, LL3), designed for engineering and scientific calculation prior to the widespread use of electronic calculators.

This example is constructed with a dual-rail frame and a clear sliding cursor, allowing for precise alignment across multiple scales. The inclusion of log-log scales indicates it was intended for more advanced calculations, including exponential functions and higher-level mathematical work, rather than basic student use.

Housed in its original fitted case, the piece presents well both as a functional instrument and as a display item. The scales remain legible, and the cursor moves smoothly across the rails. Light wear is present consistent with age, but overall condition is clean and intact.

Slide rules like this were essential tools for engineers, architects, and technical professionals throughout the mid-20th century, representing a pre-digital era of analog precision and craftsmanship.

A strong example for collectors of scientific instruments, engineering tools, or mid-century technical design.

Features & Details