Slide Rule Appraisal

Get AI-powered appraisals for your Slide Rule. Upload a photo for instant valuation.

60 second results

Free To Use

Leading AI

Vintage Keuffel & Esser (K&E) Cylindrical Slide Rule with Leather Case

This item is a vintage cylindrical slide rule, often referred to as a Thacher-style or similar precision calculating instrument, manufactured by Keuffel & Esser Co. (K&E). The object features a cylindrical body with an off-white or cream-colored finish, likely made of coated metal or plastic over a core. It displays a visible scale with a small rectangular window near the top for reading values. Toward the base, the classic 'K&E' logo is clearly embossed in a dark typeface. The instrument is approximately 8 to 10 inches in length and features a knurled metal adjustment at the bottom end for fine-tuning the internal scales. Accompanying the rule is its original protective case, which is a cylindrical holster made of dark greenish-black textured leather with a snap-down flap closure. The leather shows significant age-related wear, including scuffing, loss of finish at the stress points, and some fraying around the stitched edges. The slide rule itself appears to be in relatively good functional condition, though it displays minor surface marks and light staining consistent with mid-20th-century scientific use. These instruments were primarily used by engineers and surveyors before the advent of electronic calculators, roughly dating from the 1940s to the 1960s. The craftsmanship reflects the high precision standards of the K&E brand, a leader in drafting and mathematical tools during that era.

Estimated Value

$450 - $700

Example of a recent Slide Rule appraisal

Instant Results

Under 60 seconds

Free To Use

Free Appraisals

Leading AI

Advanced algorithms

Detailed Reports

Comprehensive analysis

How Our AI Slide Rule Appraisal Works

Upload Your Photo

Take a clear photo of your Slide Rule and upload it to our platform. One photo is all you need.

AI Analysis

Our advanced AI technology analyzes your item.

Receive Valuation

Get a detailed appraisal report with estimated value range, market insights, and item details.

View our AI appraisal disclaimer

Getting the Best Appraisal

Use good lighting to capture all details
Place item on a neutral background
Include any identifying marks or labels
Ensure the entire item is visible in frame

Powered by Advanced AI Technology

We use cutting-edge AI to provide valuation estimates. For official appraisals, insurance, or sale purposes, we recommend consulting with certified appraisers for insurance or sale purposes.

60s

Fast Results

Free

No Cost

24/7

Always Available

More Recent Slide Rule Appraisals

Explore what others have discovered

Vintage Keuffel & Esser (K&E) Cylindrical Slide Rule with Leather Case

Vintage Wooden Folding Carpenter's Rule

Crombie 'The Rules of Golf' Chromolithograph: Rule XVIII

Cecil Aldin 'Rules of Golf' Series Lithograph: Rule VI - A ball must not be pushed, scraped, nor spooned

Cecil Aldin 'The Rules of Golf' Chromolithograph: Rule XIV

Vintage Slide Projector

Adidas Adilette Comfort Slides (Black with White Logo)

Kuailu Men's Shower Slide

Vintage 35mm Photographic Slide Archive in Metal Storage Case

Charles Crombie 'The Rules of Golf' Lithograph - Rule IX

Vintage Sawyer's Rotomatic 707Q 2x2 Slide Projector with Accessories and Screen

Framed Hand-Painted Magic Lantern Slide or Narrative Diorama

Antique Billiards Rules Poster

Nike Victori One Men's Slide Sandals

Sherrin Kangaroo Australian Rules Football

Pair of Beige Comfort Slides

Charles Crombie 'Rules of Golf' Lithograph - Rule XII

Rhinestone Rectangle Hair Slide

BCBGeneration Faux Fur Slide Slipper

The Golden Rule by Norman Rockwell (Art Print)

Vintage Silver-Plated Beaded Coaster or Bottle Slide

Sawyer's Pana-Vue 1 Slide Viewer Box

Children Playing on a Slide Framed Painting

Teenage Mutant Ninja Turtles "Pizza Rules" Insulated Lunch Bag

18k Gold Opal and Diamond Dragonfly Slider

The Golden Rule Line 'The Lord Is My Shepherd' Religious Plaque No. 4131

Art Deco Style Slide Buckle or Pendant Enhancer

Rules and Forms of the House of Commons of Canada, Third Edition (1943)

Kodak Carousel Slide Projector

Vintage Master Rule Manufacturing Co. 'Tufboy' No. 306 Steel Tape Measure

Cape Robbin Holographic Iridescent Platform Slide Sandals

J.C. Higgins Slide Action .22 Caliber Rifle Barrel

18k Gold Opal and Diamond Accent Slider Pendant

18k Gold Amethyst, Topaz, and Diamond Rainbow Gemstone Slider Pendant

Vintage Sapphire and Diamond Yellow Gold Slide Necklace

Kodak Ektagraphic III AT Slide Projector

Vintage Gold-Tone Filigree Bolero Slide Necklace

Signed Black Sabbath 'Mob Rules' Framed Vinyl Record Display

Art Deco Style Rhinestone Buckle or Decorative Slide

Silver-Tone Snake Chain Necklace with Solitaire Slide Pendant

Ready to Appraise Your Slide Rule?

Get your free AI-powered appraisal in under 60 seconds

No registration required • Free To Use • Instant results