Vintage K&E (Keuffel & Esser Co.) Deci-Lon slide rule.

Made in USA.

Includes:

• Original orange case

• Slide rule with cursor

Features:

• Multi-scale engineering calculations

• Precision metal-reinforced ends

• Clear sliding cursor

• Professional engineering model

This is a classic pre-calculator engineering tool used by architects, engineers, aviation professionals, and students before electronic calculators became standard.

Slide moves properly. Scales are legible. Case shows normal vintage wear.

Great display piece, functional collectible, or addition to a scientific instrument collection.

See photos for condition and measurements.