Eighteen Circular Slide Rules and Calculators

A group of eighteen circular slide rules and calculators, comprising: Scientific Instruments circular clide rule, No. 300-b with box and case, a Cruver computer, altitude correction AN5837-1 with box,

Five (5) Pocket Watch Style Logarithmic Circular Slide Rule Calculators, including four (4) Fowler's calculators, 5 items total. 1st-4th items: Four (4) Fowler and Company, Manchester, England, calcul

A Stanley Fuller Calculator Circular Slide Rule w. f. stanley & co. ltd., london, 1950 with a fitted wood case and brass mounting arm, together with a Fowlers: Twelve-Ten calculator. Length of first 1

circa 1940. circular slide rule type device used in fixing navigation points at sea. L11" Note: Writing on fitted box includes "German Submarine U865". U-865 was launched July 12, 1943 and went missin

A fascinating mathematical calculator that became known as the circular slide rule.

Five (5) early calculators or slide rulers, including one (1) G. Small Pocket Calculator, Roberts Everard type box rule, G. Charpentier Calculimetre, Sexton's Omnimetre Circular Slide Rule, and one (1

1st item: Eckel Dial-O-Matic Engineer's or Engineer's Log Log slide rule, manufactured by Lithocalculator Company, Arcadia, California, circa 1955. Comprised of two celluloid-coated aluminum disks, on

Five Pocket Circular Slide Rules, English, early 20th century, Including three examples by Fowler, the larger in case with instructions, a Haltham's 'Calculex' example, and another similar, the larges

Large Lot of Vintage Slide Rule Calculators

1920s Halden Calculex circular slide rule, from J. Halden and Co. Case not included, measures 2 1/4" across.

PICKETT DIAL RULE CIRCULAR SLIDE RULE 101-C WITH CASE AND BOOKLET | VINTAGE COLLECTIBLE SLIDE RULE RULER ARCHITECT ALGEBRA TRIGONMETRY ENGINEER TOOL DRAFTING -CONDITION ALIGNS WITH VINTAGE WEAR -CASE

THE BINARY CIRCULAR SLIDE RULE COPYRIGHTED 1931,1940 WITH BOOKLET | VINTAGE COLLECTIBLE SLIDE RULE RULER ARCHITECT ALGEBRA TRIGONMETRY ENGINEER TOOL DRAFTING -CONDITION ALIGNS WITH VINTAGE WEAR -CASE

CIRCULAR SLIDE RULE LOT TWO KEY LINE'S "CONCISE" CIRCULAR SLIDE RULE LOG WITH FEDDERS AIR CONDIONING & HEATING (CASES AND BOOKLETS INCLUDED), CARRIER CIRCULAR MULTIPLYER, C-THROUGH TS-649 ENGINEERS. |

London; c. 1900. Fuller spiral slide rule / calculator by Stanley with original mahogany dovetailed case. 17" (43.3 cm)

Seven (7) circular slide rules, including Dietzgen 1798 Dempster RotaRule Model AA, Loga. 1st item: Dietzgen 1798 Dempster RotaRule Model AA 50-Inch Pocket slide rule, designed and manufactured by Jac

2 Logarithmic Calculating Drums 1) Professor Fuller's Spiral Slide Rule Calculator, 1889 onwards, made in England by Stanley, with wood handle, in mahogany case. - And: 2) Calculator Loga, 23 3/5 in.

Gentleman's Ikepod Megapode GMT chronograph titanium wristwatch, limited edition 0155/9999 Dial: black and gray, slide rule calculator, registers for 24 hours (GMT), 30 minute, 12 hour chrono and seco

2 Logarithmic Calculating Drums 1) Professor Fuller's Spiral Slide Rule Calculator, 1889 onwards, made in England by Stanley, length of the barrel 11 ¾ in., with wood handle, in mahogany case. -

Includes circular concise slide rule, Pickett slide rule, technical supply co drafting set, magnifying glass and 8" triangle template. LR IMPORTANT: Before bidding, please read the terms and condition

Vintage Slide Rule , Frequency Wavelength Calculators , Rotating Charts for Math and Physics

Two (2) Faber Castell, Germany scientific items, including one (1) Mathema 2/84 Full Hyperbolic duplex slide rule, comprised of white plastic with a plastic cursor with hairlines and plastic edges hel

ANTIQUE CALCULATOR, SLIDE RULE CYLINDER *FULLERS SLIDE RULE* K & S IN FITTED BOX W/LOCK & KEYS, APPROXIMATELY 18 IN X 5 IN X 4 IN, #495

Mahogany Cased Slide rule or cylinder calculator by Edwin Thatcher. Mahogany and Brass mounts. Complete, Original. Very good to excellent condition with minor signs of gentle use, but no wear or damag

Lot of Three (3) Antique Umbrella and Canes. The umbrella with chased metal and enamel beaded handle. One stick with and Otis King Pocket Calculator Slide Rule Handle, one a Chinese carved bamboo stic