Slide rule made for Shell for oil-fired combustion calculations, plastic, with cursor and reversible slider for Dutch or English use, in carrying case Slide rule made for Shell for oil-fired combustion Mathematics

10-Inch slide rule with sprung cursor by Sterling Plastics Company, New Jersey, in celluloid case with instructions 10-Inch slide rule with sprung cursor by Sterling Mathematics 1960-1975

Slide rule with cursor in plastic, 15 cm, made in Czechoslovakia, c. 1950, by Logarex, in leather case Slide rule with cursor in plastic, 15 cm, made in Mathematics 1947-1952

Slide rule, Reading off Kilowatts, Horse-power etc. Made in Japan. 11 1/2"x1 1/2" Japanese slide rule Tools of the Trade & Personal Accessories

Academy Series Blundell 804 Darnstadt (10-inch) slide rule with plastic case and instructions Academy Series Blundell 804 Darnstadt (10-inch) sl Mathematics 1965-1975

W H Smith and Sons 5-inch Simplified Rietz slide rule with plastic case W H Smith and Sons 5-inch Simplified Rietz slide rule Mathematics 1970-1980

Fowler's calculator type H (pocket size). Includes steel and velvet lined case. Fowler's Calculator Mathematics 1918-1923

Halden's 'Calculex' patent circular slide rule in silver case. "Calculex" Circular Slide Rule Mathematics 1908

Slide-rule, plastic, 11 3/4" x 1 5/8", Omega series, no.401, having adjustable tension, with small 1-inch screwdriver and cursor; in box Slide-rule, plastic, 11 3/4" x 1 5/8", Omega serie Mathematics 1959

Slide rule in white plastic with cursor. Multimath duplex no.0130 by Nestler, Schwarzwald, West Germany, plus plastic rule in leather case with instructions, all in original printed cardboard box Slide rule in white plastic with cursor. Multimath Mathematics 1965-1975

Slide Rule made and used in the Occupational Health Department of the London School of Hygiene and Tropical Medicine, 1945-1975 Slide Rule, London School of Hygiene and Tropical Medicine Public Health & Hygiene

Nickel plated brass slide rule by Richer Guyard & Canary, Paris Nickel plated brass slide rule Mathematics

Slide rule in white plastic with cursor, polylog no. 720 by Diwa, Denmark, in original case and printed cardboard box Slide rule in white plastic with cursor, polylog n Mathematics 1965-1975

Hemmi 'Sun' No.P280 (10-inch) slide rule with plastic case and instructions Hemmi 'Sun' No.P280 (10-inch) slide rule with pla Mathematics 1960-1970

Wooden (10-inch) slide rule with metal slider by Jackson Brothers Limited, Leeds, with cardboard case. Wooden (10-inch) slide rule with metal slider by J Mathematics 1930-1950

A. W. Faber-Castell 57/87 Rietz (10-inch) slide rule with plastic case A. W. Faber-Castell 57/87 Rietz (10-inch) slide ru Mathematics 1960-1970

Sterling No.594 Decimal Trig multilog (10-inch) slide rule with plastic sleeve Sterling No.594 Decimal Trig multilog slide rule Mathematics 1965-1970

British Thornton AD 160 (10-inch) slide rule by British Thornton Limited with plastic case Slide rule Mathematics 1970-1975

W.H. Smith student (10-inch) slide rule by Blundell Harling Limited with plastic case Slide rule Mathematics 1970-1975

Unique Log-Log (5-inch) slide rule with cardboard case Unique Log-Log (5-inch) slide rule Mathematics 1945-1955

W.H. Smith Log-Log Trig (10-inch) slide rule by Blundell Harling Limited with plastic case Log-Log Trig slide rule Mathematics 1970-1975

Blundell 601 Rietz (5-inch) slide rule with leather sleeve Blundell 601 Rietz (5-inch) slide rule with leathe Mathematics 1965-1970

The "Lee" sheet steel weight calculator with instruction sheet and plastic case. The "Lee" Sheet Steel Weight Calculator Mathematics 1960-1965

Lalanne's slide rule, glass, with printed paper scales. Lalanne's slide rule, glass, with printed paper scales Mathematics 1850-1851

Slide-rule, plastic, 11 1/4" x 1 3/4", Academy series, no.303, with cursor; in box Slide-rule, plastic, 11 1/4" x 1 3/4", Academy ser Mathematics 1959

Slide Rule, "Brown's Permanent Way Slide Rule, Pre Pat. 6073-1949". 11 1/2"x2" Brown's Permanent Way Slide Rule Tools of the Trade & Personal Accessories

Slide Rule, "Hudson's Horse-Power Computing Scale. Small wooden double slide rule in leather case with instructions. Dimensions : 5 3/4"x2 1/2" Wooden slide rule Tools of the Trade & Personal Accessories

Slide rule from Hydrometer, Allan, Edinburgh, 1740-1800 Slide rule for hydrometer Laboratory Medicine 1740-1800

Advergi (5-inch) slide rule with pigskin case, note pad, pen and instructions Advergi (5-inch) slide rule with pigskin case, no Mathematics 1970-1975

Bamboo brand, Hemmi 'Sun' No.2664 (10-inch) slide rule with cardboard case Bamboo brand, Hemmi 'Sun' No.2664 (10-inch) slide Mathematics 1955-1965

A. W. Faber-Castell 67/554b Darnstadt (5-inch) slide rule with plastic sleeve A. W. Faber-Castell 67/554b Darnstadt (5-inch) sli Mathematics 1960-1970

Stadtler Mars 544A (10-inch) slide rule with plastic case and cardboard packing box Stadtler Mars 544A (10-inch) slide rule with plas Mathematics 1970-1975

CASTELL-Addiator slide rule by A.W. Faber, model 1/87 A CASTELL-Addiator slide rule by A.W. Faber, model 1 Mathematics

Slide rule, "Hepworth's Permanent Way Rule". Steel rule made by "I & D. Smallwood, Birmingham". In yellow card box with original instructions. 12 3/4"x1 3/4"; 325x45mm Hepworth's Permanent Way slide rule Tools of the Trade & Personal Accessories

Blundell Harling 802 Log-Log (10-inch) slide rule with plastic case Blundell Harling 802 Log-Log (10-inch) slide rule Mathematics 1965-1975

Thornton P.I.C. No.171/PC17 (10-inch) slide rule by A.G. Thornton Limited with cardboard case Thornton P.I.C. No.171/PC17 (10-inch) slide rule b Mathematics 1955-1965

Omega Series Blundell 405 (10-inch) slide rule with cardboard case Omega Series Blundell 405 (10-inch) slide rule wit Mathematics 1955-1965

J Halden & Co Ltd 'Calculex' circular calculator, c. 1915, with case and instruction booklet. "Calculex" Circular Calculator Mathematics 1910-1920

British Thornton P.I.C. No.P271 Student Log-Log (10-inch) slide rule by British Thornton Limited with plastic case British Thornton P.I.C. No.P271 Student Log-Log (1 Mathematics 1965-1975

Brass slide rule in case, by Troughton, 7 1/2 " long, 3/4" wide with one slide; engraved at ends on one side, "Troughton's London fecit", on other side, "John Booth Brush house 1791". Brass slide rule in case, by Troughton, 7 1/2 " lo Mathematics 1791

Fowler's Vest Pocket calculator with cloth cover, case and instruction leaflet. Fowler Vest Pocket Calculator Mathematics 1950-1955

Otis King patent cylindrical slide rule, made by Carbic Ltd. Otis King Model L Calculator Mathematics 1923

Slide rule for tape-wound core calculations with single slider, cardboard, in envelope with instructions, made 1957 by Perrygraf, Illinois for Magnetics, Pennsylvania Slide rule for tape-wound core calculations with s Mathematics 1957

Slide rule, wood 2' 4 1/2" x 1 5/8" x 7/16"; one slide 2' 5 3/8" long, in case Slide rule, wood 2' 4 1/2" x 1 5/8" x 7/16"; one s Mathematics

FAG (5-inch) slide rule with leather sleeve by Fischer Bearing Compant Limited, Wolverhampton FAG (5-inch) slide rule with leather sleeve by Fis Mathematics 1950-1960

Slide Rule, Kansas City Southern RR Co., Slide rule for steam locomotive calculations. Former property of E.P.O'Connor Mechanical Engineering Draughtsman for Kansas City Southern Rail Road Co. in 1940's. (In original box with instructions. "Geo.W.Richardson's Direct Reading Slide Rule". 11"x1 3/4" Slide rule, Kansas City Southern Railway Tools of the Trade & Personal Accessories