A few examples of appraisal values for
SLIDE RULE

• COLLECTION OF ASSORTED SLIDE RULERS
  COLLECTION OF ASSORTED SLIDE RULERS AND MANUALSCollection of Assorted Slide Rulers and Manuals
• Yellow slide rule advertizing
  Yellow slide rule advertizing sign labeled "Picket All-American Quality Slide Rules". 8.75"h x 48"l
• ARISTO MARTIN SPACE SLIDE RULE PLUS
  ARISTO MARTIN SPACE SLIDE RULE PLUS HANDBOOK & BOXMartin Space Rule slide rule, Nr. 80123, manufactured by Aristo, Germany, 1962. Comprised of double-sided white plastic with a plastic cursor with a plastic frame held together with metal screws. Includes Space Rule Handbook and brown leather case with original cardboard box. Slide rule: 7 1/4" L. Box: 8" H x 7" W x 1" D. Condition: Slide rule in overall very good condition with expected surface wear. Box, case, and instruction manual with minor tears, dampstaining, general wear to be expected from age and manner of use.
• 2 CIRCULAR SLIDE RULES, INCL. ECKEL
  2 CIRCULAR SLIDE RULES, INCL. ECKEL ENGINEER'S & ROTARU...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, one on top of the other, with a clear plastic cursor, the end piece held together with a metal screw. Includes an instruction manual for the Layman's model with additional insert for the Engineer's model, and a brown plastic case. Slide rule: 7 1/2" dia (includes cursor). 2nd item: RotaRule Model 510 50" pocket size circular slide rule, manufactured by Boykin Products Company, Ruxton, Maryland, circa 1963. Comprised of double-sided white plastic with a clear plastic cursor with a white plastic end piece held together with metal screws. Includes brown leather case, instruction manual, a Rota Rule parts lists, and a miniature screwdriver, with original box. Slide rule: 6" dia (includes cursor). Box: 8 3/4" H x 6 1/4" W x 1 1/4" D. Condition: Slide rules in overall very good condition with expected surface wear. Boxes, cases, instruction manuals with minor tears, dampstaining, general wear to be expected from age and manner of use.
• Brass Rolling Rule 24''
  Brass Rolling Rule 24''
• 7 PCS, SLIDE RULE CALCULATORS &
  7 PCS, SLIDE RULE CALCULATORS & MEASURING DEVICES American and British, 19th and 20th century. Collection of seven scientific measuring devices comprising four rulers, US Government Load Adjuster slide rule, and two slide rules. Three slide rules with cases. Approx. w. 13" (longest)
• A brass bound writing slope
  A brass bound writing slope
• KEUFFEL & ESSER LOG LOG DECITRIG
  KEUFFEL & ESSER LOG LOG DECITRIG DUPLEX RULERKeuffel & Esser Company 4081-5 twenty inch mahogany slide rule coated with white celluloid on both sides and held together with metal end pieces, in a protective leather case. Marked. Case measures approximately 23" long.
• 3 KEUFFEL & ESSER CO. SLIDE
  3 KEUFFEL & ESSER CO. SLIDE RULES, INCL. NORDELL SEWERKeuffel and Esser (K&E) slide rules, including one (1) Nordell Sewer Slide Rule; one (1) 4160 Chemist's 10" Mahogany Duplex slide rule; and one (1) 4088-3 Polyphase Duplex Slide Rule. All comprised of mahogany, with plastic or glass cursors with plastic or metal edges held together with metal screws. Duplex slide rules with two-sided coated celluloid and L-shaped metal end pieces. Maker's marks and model numbers, front and top edge of cursors, some with maker's marks and model top edges or obverse of slide rule. All housed in orange or black K& E cases. Slide rules ranging in size from 11 3/8" to 12 1/4" L. Cases ranging in size from 11 5/8" to 13" L. All items 1st-3rd quarter 20th century. Condition: All items in overall very good condition with light wear, toning to celluloid, to be expected from age and manner of use. Cases with expected wear, surface grime. Orange case with stamp from previous owner to interior of flap.
• A 12 inch ivory Rabone
  A 12 inch ivory Rabone carpenter's folding rule a boxwood and brass caliper rule and a map measurer.
• FABER CASTELL MATHEMA 2/84 SLIDE
  FABER CASTELL MATHEMA 2/84 SLIDE RULE & TR4 SCIENTIFIC ...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 held together with metal screws (12" L), and one (1) TR4 scientific slide rule calculator, comprised of black plastic with green, orange, off white, and grey buttons (6 3/4" L). Maker's marks to edge of slide rule cursor and front of calculator. Both include original cases. Both items 3rd quarter 20th century. Condition: All items in overall good condition. Slide rule case with wear, does not completely close. Calculator not tested for functionality, requires a new battery charger.
• * A Thacher Calculating
  * A Thacher Calculating Instrument Keuffel & Esser Co. New York the slide rule cylinder raised on a rectangular base with original manual. Width 21 3/4 inches.
• A brass parallel rolling rule by
  A brass parallel rolling rule by G Lee and Son The Hard Portsmouth 48cm (19") wide cased
• EARLY 20TH C. GERMAN HERMANN
  EARLY 20TH C. GERMAN HERMANN SCHWERDTFEGER SLIDE RULEEarly 20th century German slide rule mechanical analog computer with original wooden case marked "Hermann Schwerdtfeger. Jnh. Martin Jacobi. Wesermunde-G." along the interior. Pre-World War II. Slide rule; height: 1 1/2 in x width: 11 1/2 in x depth: 1/4 in. Case; height: 2 1/4 in x width: 12 1/2 in x depth: 1 in. Condition: Please contact us for a detailed condition report. Please note that the lack of a condition statement does not imply perfect condition. Email condition@revereauctions.com with any condition questions.
• 4 PICKETT SLIDE RULES, INCL.
  4 PICKETT SLIDE RULES, INCL. COLLINS RADIO COMPANY, GEO...Four (4) Pickett duplex slide rules, including: one (1) Collins Radio Company Model C 19-T Microwave Transmission Dual Base Log Log speed rule; one (1) Georgia Iron Works Company Hydraulic slide rule, designed by Danforth W. Hagler; one (1) Electro Optical Industries Model 17 Radiation slide rule; and one (1) Warren-Knight Company Weight Rule No. 1373-G. All comprised of metal with white or yellow double-sided coating, with frameless plastic cursors with plastic edges held together with metal screws, and metal end pieces. Maker's marks and model numbers, to obverse and reverse edges of slide rules. All include original brown or black leather cases, Collins slide rule with laminated explanation card, Warren-Knight slide rule with outer box and guarantee registration card. Slide rules approximately 12 1/4" L. Cases approximately 13" L. All items 2nd-3rd quarter 20th century. Note: Georgia Iron Works and Electro-Optical Industries examples do not have Pickett maker's marks to slide rules. Condition: All items in overall good condition with expected wear, surface scratches to coating. Case with surface wear, Electro Optical Industries case with inscription from previous owner to interior of flap.
• ASSORTED ITEMS Including a K E
  ASSORTED ITEMS Including a K E slide rule in leather case; a German drafting kit, advertising ruler; an Egyptian style soapstone scarab with hieroglyphics; letter openers, Zeiss binoculars, and other items.
• ROLLING BLACK JAPANESE STYLE
  ROLLING BLACK JAPANESE STYLE VERTICAL SLIDING SCREEN WITH ROLLING LADDER in two parts the rolling library ladder is 73 x 16 1/4 in and the black wood framed rice paper screen (to cover the ladder) is 68 1/2 x 20 in.
• TWO METAL MOUNTED FOLDING
  TWO METAL MOUNTED FOLDING TWO-FOOT RULERSTwo Metal Mounted Folding Two-Foot Rulers,
• DRAFTING TOOLS AND SLIDE RULES,
  DRAFTING TOOLS AND SLIDE RULES, KEUFFEL & ESSER. Mostly American, mid 20th century. Two maple T squares, 32.5", 36"l., compass, drafting brushes and a group of slide rules including aluminum. Four in cases including three by Keuffel & Esser. Together with an instruction booklet by Keuffel & Esser Co. Cases have wear.
• REYNARD MILICI (AMERICAN, B. 1942),
  REYNARD MILICI (AMERICAN, B. 1942), THE SLIDE, OIL ON P...Reynard Milici (American, b. 1942), The Slide, oil on panel, unsigned, 19 1/2" x 19". Provenance: Arts Exclusive Gallery, Simsbury, Connecticut. Private collection, Connecticut, acquired from the above, 1994. Condition: All lots are sold "AS IS" The condition of lots can vary widely and are unlikely to be in a perfect condition. *No credit card payments will be accepted for silver, gold, or jewelry from buyers that have not purchased from our gallery in the past.
• Collection of Three Folding
  Collection of Three Folding Straight-Edge Rulers, including a Miller and Adie engraved bone example, first quarter 20th century, another similar engraved bone example, and an English brass-mounted boxwood folding rule of yardstick length, also first quarter 20th century, l. 6-1/4" to 9-1/2".
• TWO ANTIQUE 19TH CENTURY SAILOR
  TWO ANTIQUE 19TH CENTURY SAILOR MADE STRAIGHT EDGE RULE...Two Antique 19 th Century Sailor Made Straight Edge Rulers , one of whalebone construction, the other of tropical hard wood and brass. Condition: Items may have wear and tear, imperfections or the effects of aging. Please contact the gallery for further details prior to bidding. Any condition statement given as a courtesy should not be treated as fact.
• DOLLOND ROLLING RULE BRITAIN, CIRCA
  DOLLOND ROLLING RULE BRITAIN, CIRCA 1780 RULER LENGTH 12". CASE HEIGHT 1". LENGTH 12.75". WIDTH 2.75".DOLLOND ROLLING RULE, Britain, Circa 1780, By Peter Dollond (British, 1731-1821). Signed on one end "Dollond London 1673". Ebony ruler with ivory inch scales on either long edge, divided by tenths. One side is beveled downward for map reading and plotting, and the other side is beveled upward for ink drawing. Roller arm with two milled brass wheels with ivory readouts in tenths of inches and geared to drive a central pointer reading against an enameled dial likewise divided into tenths of an inch. Original fitted wood case bound in fish skin, lined in green velvet and with three brass catches. Dimensions: Ruler length 12". Case height 1". Length 12.75". Width 2.75". Provenance: Tesseract, Hastings-on-Hudson, New York.The Kelton Collection of Marine Art & Artifacts.Notes:This is the sophisticated mechanical readout version of the rolling rule invented by A.G. Eckhardt of London in 1771 (British patent #985). He apparently left the patent with Peter Dollond. When used with care, the ruler permitted rapid two dimensional plotting of points on a graph. It is most rare.
• LEITZ WETZLAR SLIDE PROJECTOR Leitz
  LEITZ WETZLAR SLIDE PROJECTOR Leitz Wetzlar slide projector.
• The seven sliders variously
  The seven sliders variously decorated with a portrait snake butterfly and other motifs 59.8 gms
• A Burroughes & Watts billiards
  A Burroughes & Watts billiards scoreboard, 50cm x 90cm a cue stand and a variety of cues/see illustration
• Reels of ribbon
  Reels of ribbon
• 2pc Old Long Straight Edge
  2pc Old Long Straight Edge Rulers- 6' and 7'
• Wood measures and slide measures to
  Wood measures and slide measures to include Stanley 65, Stanley 77, (2) unmarked antique, (7) folding rulers, triangle ruler, slide and brass measuring device and Stanley yardstick no. 33
• GROUP OF SHAKER MEASURING RULES
  GROUP OF SHAKER MEASURING RULES In various sizes maple and cherry with stamped number markings together with a turned wood tape measure one stamped ''VL Allen.'' 12 to 24 in.
• SVE MODEL RK MINIATURE SLIDE
  SVE MODEL RK MINIATURE SLIDE PROJECTOR SVE Model RK Miniature Slide Projector. Includes case and manual.
• Graduated Collection of Five
  Graduated Collection of Five English Brass-Mounted Birch or Boxwood Measuring Tools, first quarter 20th century, including a folding ruler by D. Rabone and Sons, Birmingham, also fitted with a slide gauge, l. 3-3/8" extending to 12", a pair of Rabone boxwood "No. 1380" model folding rulers, l. 6-5/8", extending to 24", and larger matching Rabone "No. 1330" model folding yardstick, l. 9-1/2", extending to 36", and a Phillip, Harris and Co. Ltd., Birmingham slide gauge, l. 4-1/2".
• Drafting sets & more, c/o (2)
  Drafting sets & more, c/o (2) drafting sets in wood cases, sliding lid box with CT Cooper & Sons Ltd London triangular ruler, Shelton & Osborn Mfg Co Parallel Rulers for Counting Houses, H Hughes & Son Ltd ship stability and trim indicator, Keuffel & Esser beginner slide rule, (2) ebony & brass parallel rulers, (2) additional wood boxes & contents, Polygraph Co Phila 1885 brass device for laying off geometric figures, leather slide rule case
• Three telescopic wood surveying
  Three telescopic wood surveying rules (r. to l.) by A. Lietz (82"l), Lenker (Rod-32A) (64.5"l) and Brunson (69"l), circa 1900-1950. Condition: Minor wear, some losses, minor rust, wear consistent with age.
• (37) Colored Glass Slides & Magic
  (37) Colored Glass Slides & Magic Slide ViewerThirty-six colored glass slides: sailors with wildcat in barrel the headless horseman courting couples Victorian card players black boxers dressed like Uncle Sam themes 3.25'' square glass slides circa early 20th century good condition. Private collection Clarkston MI.
• AntiqueThacher's Model 4012
  AntiqueThacher's Model 4012 Calculating Instrumentby Keuffel & Esser Co. New York early 20th century slide rule cylinder in fitted mahogany dovetailed case No. 4012 and serial #2035 on both instrument and case. With original instruction manual dated 1920.Case 6.5 x 24 x 6.5 in.Scuffs to the case from normal use as expected; light brown spotting on the bars.