• 455 Martinson, Los Angeles
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  • Pocket Octal/Hexadecimal calculator for computer programmers
  • Mystery Dennert & Pape Desktop “Quadrat-Rechenscheiber”
  • Post 1824 Dring & Fage Gauging Rule
  • Darnley’s Rotable Lightning Calculator/Pencil Case
  • Lawrence Antenna (classified in WWII)
  • Makeba Kombinator pencil & slide rule
  • Rare Carbic-made Fischer Calculator
  • For calculating in Twaddells !!
  • PTT rule for Cable Radio (Signal Loss/dB)
  • Smallest drum (≈ 2.4m) made by LOGA

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You searched for: desktop
MakerModelTypeMaterialCommentsThumbnail
A.W. Faber380Desktop Enhanced Mannheimwood/celluloid veneers

Gold lettering + cm scale in well of stock - INCHES to METER printed conversion scale on back

A.W. Faber-Castell2/62Desktop Reinforced Concrete - System Dywidag plastic

extra long rule

A.W. Faber-Castell3/11Desktop Structural Engineeringwood/celluloid veneers

special tables on back

A.W. Faber-Castell3/31Desktop Reinforced Concretewood/celluloid veneers

Nomogram on slide and scales in well of stock

A.W. Faber-Castell342 (ver. 2)Desktop Columbus Business long-scale - System Rohrberg Wood/celluloid veneers

Joint branding with KLAWUN + 1st F-C specialist rule for Merchants - extra wide body

A.W. Faber-Castell4/22Desktop Businesswood/celluloid veneers

conversion table on back

A.W. Faber-Castell4/38Desktop Topographywood/celluloid veneers
A.W. Faber-Castell4/54Desktop Darmstadt - earlywood/celluloid veneers

Conversion tables & factors on back

A.W. Faber-Castell4/54Desktop Darmstadtwood/celluloid veneers

No blind date stamp - coversion tables & factors on a plastic book-mark

A.W. Faber-Castell4/87Desktop Rietzwood/celluloid veneers
A.W. Faber-Castell4/98Desktop Electrowood/celluloid veneers

V & W scales in well of stock

A.W. Faber-Castell44/87Desktop Rietzlaminated wood/celluloid veneers

Part of unusual limited series made from high pressure laminated (HPL) wood with metal inserts - patent no. DE892693

A.W. Faber-CastellLaukhuff OrgelpfeifenDesktop Music Organ Pipes - System Renschthick plastic

Made for German organ builder: Laukhuff. Company still operating. For scaling organ pipes (wood/metal flues & reeds) - superb quality but only 500 ever made - Orgelbau-Verlag started selling their own (inferior) version in 1986

Aristo010608 Studio Desktop Technical/Log-Logplastic

Extra wide ​- 25cm (no. 0968) & 12.5cm (no. 868) versions also made

Aristo01070 MultiLog Desktop Technical/Log-Logplastic

Extra wide ​- Multilog v/s Studio = extra LL00 & LL0 scales - 25cm (no. 0970) & 12.5cm (no. 870) versions also made

Aristo1055Desktop Commerz I Businessplastic

Series of imperial to metric conversion gauge marks on lower front face - s-d-£ scale is folded - inch scale on back - 25cm (no. 955) & 12.5cm (no. 845) versions also made ​

Aristo1067 UDesktop Darmstadtplastic

​inch scale on back

Aristo30050 Lindell "55"Desktop Transversal Planimetermetal/plastic

No slide - specially commissioned by Finnish stationers Ab Herman Lindell Oy - for measuring distances/areas - cursor extension suggests results were transposed for further working - name Herman Lindell + “import” & “copyrighted” in Finnish on the back

Blundell Brothers/Rules Ltd. (BRL)T.20 Technicians Desktop Log-LogBakelite/PVC (Astralon) facings

No batch number but 4 tensioning pins & 4 chiselled out recesses in each end of top & bottom side edges to combat Bakelite shrinking problems + plain Bakelite back - read more ...

Casella, L.P.(NoName)Desktop "prototype"wood/celluloid veneers

Stamped CASELLA but possibly made by UK maker W.H. Harling - upside-down scales on the slide probably a design feature when inverting the slide - read more ...

Dennert & PapeAristo 1067 UDesktop Darmstadtplastic

D&P name in well of stock - ​inch scale on back

Dennert & PapeAristo 109 Desktop Rietzplastic
Dennert & PapeGWRDesktop Military Naval Artilleryplastic

Instruments for German armed forces used codes to hide maker’s identity - GWR​ = D&P - besides solving normal artillery-related distance problems, this naval version also takes into account drift of a moving vessel

Dennert & PapeIVDesktop Enhanced Mannheimwood/celluloid veneers

IV = model with 4 adjustment screws in bottom edge - railway track scales - cm scale in well of stock​

Dennert & PapeQR 41Desktop Squaringplastic

QR = “Quadrat-Rechenschieber” - additional “Gebr. Wichmann” stamped in well of stock - unusually only does x2 or √x calculations - upper set of scales = greatly extended W2 range - lower set for more precision when result in range 0 to 15.8 - no interaction possible between upper & lower sets of scales​

Dietzgen1752Desktop Maniphase/Enhanced Mannheimwood/celluloid veneers

Going by style of π gauge mark probably made by D&P + Maniphase = Dietzgen​ name for an Enhanced Mannheim + slightly longer slide + 6 adjustment screws & conversion table on back

Dring & FageCarpenter TimberDesktop Coggeshallwood/brass

Rare rectilinear Coggeshall with 4–40 GIRT LINE for volumes of round timber + 2 sets of brass gauge pins (marked 0,16, 8 & 8,16, 0 respectfully) for round, 8 or 16 sided timber + INVERTED LINE (AI scale) for volumes of rectangular timber - compared to Langley version layout front & back reversed

Dring & FageCustoms & Exercise D-F-52Desktop Alcohol Gauging Head Rodwood/brass

Seg Ly. scale on front face is for gauging when the cask is lying on its side + SPH’D scale on back face is for calculating the spheroid

Dring & FageMark VI Desktop Artillery for Indirect Firealuminium/nickel silver

Serial no. = 36 - called Apparatus for the Observation of Fire was intended for use by lance-corporals & corporals - issued by Min. of Defence (inventory no. 302SB) ​

Dring & Fage(NoName)Desktop Alcohol Gaugingwood/brass

Post 1824 because of IM B & IM G gauge marks signify change from Winchester to Imperial based measurement - bottom Seg Ly. scale is for gauging when the cask is lying on its side

DUVAL, Roger(NoName)Desktop Rietz + LLplastic

Little known French maker (Drancy, Paris) - noticeable similar to Graphoplex made SRs - extra wide - top LL scale not standard for Rietz giving unconventional scale layout

Farmar, F.C.Wine & Spirit Merchants' RuleDesktop Standard for Wine & Spirit Tradewood/ivorine verneers/brass bindings

Rule for entire trade to calculate over/under proof alcohol, gauging, blending, stocktaking, discount & profit + Gloucester Terrace address

Geo. W. RichardsonSlide Rule Model of 1917Desktop Artillery Range Findingbrass/wood/celluloid veneers

Robust military grade OEM for J. H. Weil & Co. - Trig scales are in Mils (6400 mils = 360 degrees)​

GraphoplexDYNSTAT Desktop Impact Testingplastic

DYNSTAT is a mechanical impact/resilience testing method popular in Germany (DIN 53435) for testing small samples of plastic ​

Hemmi279Desktop Expert Mechanical Engineermetal/plastic

Desktop version of 25cm model 259​

Hemmi70Desktop Improved Rietzwood/metal/celluloid veneers

Also sold as Tamaya 4480 ​- table of conversion factors on back

Hicks J.J.Pilot Balloon Mark IDesktop Meteorology poly-slide (2)wood/celluloid veneers

Meteorological Office (MO) No. 676/38 - innovatively two slides can be locked together & act as one or when unlocked, move independently BUT even when unlocked, if top slide is moved it takes bottom one with it.

J. A. Nicholl & Co.Mark VI Desktop Artillery for Indirect Firealuminium/nickel silver

Serial no. = 48 - called Apparatus for the Observation of Fire was intended for use by lance-corporals & corporals - issued by Min. of Defence

John Davis & Son (Derby) LtdDemocratDesktop Mannheim with trig scaleswood/celluloid veneers

15” version of Autocrat model with extension of cm scale (16-32) in well of stock. “British Made” - steel back + paper table of conversion factors

John Davis & Son (Derby) LtdDurocratDesktop Mannhiemwood/celluloid veneers

Unmarked - cm scale extension + 6 slits in well of stock - L scale reversed

Keuffel & Esser4051Desktop Enhanced Mannheimwood/celluloid veneers

Serial no. 322 + 5 adjustment screws & conversion table on back

Keuffel & Esser4080-5Desktop Decitrig Log-Logplastic/metal straps

Serial no. 445698

Keuffel & Esser4081-5Desktop Decitrig Log-Logplastic/metal straps

Serial no. 902506

Keuffel & EsserN-4053-5 Desktop Polyphase Enhanced Mannheimwood/celluloid veneers

N prefix for new version + serial no. 740727 + 5 adjustment screws & conversion table on back

Keuffel & EsserN-4096Desktop Merchants' Businesswood/celluloid veneers

N prefix for new version + serial no. 699855 + stripped back scale layout for just x, ÷ & proportions + 5 adjustment screws & conversion table on back​ + with the lid open can be used in box!

Keuffel & EsserN-4101 Desktop Stadia Surveying Topographywood/celluloid veneers

N prefix for new version + serial no. 106473 + 5 adjustment screws & conversion table on back

Klawun, Joe10001 Ü (F-C 4/22)Desktop Businesswood/celluloid veneers

OEM version made by Faber-Castell - British pre-decimal

Leningrad Factory(NoName)Desktop Military Artillery Range Findingwood+metal/celluloid veneers

Made in the style of earlier Russian Prometei-made military/pilot slide rules. Intriguingly the military RWTL-2 labelling (in German) on the box stands for Rockets and Weapons Storage - 2 @ Hennersdorfer Heide, Lower Austria. ​

LFAI - Leningrad(NoName)Desktop Rietzwood/celluloid veneers

ROCT (GOST) Russian State Standard No. = 5161-57 + conversion factors & formulas on back​

Nestler0215Desktop Darmstadt 360°wood/celluloid veneers

tables of conversion factors on back

Nestler0235Desktop Rietzwood/celluloid veneers

tables of conversion factors on back

Nestler18Desktop Enhanced Mannheimwood/celluloid veneers

cm scale in well of stock + tables of conversion factors on back

Nestler21aDesktop Darmstadt 360°wood/celluloid veneers

cm scale in well of stock + table of conversion factors on back

Nestler23a (A/R)Desktop Rietz - latewood/celluloid veneers

Unusual scale length​ - tables of conversion factors on back

Nestler24Desktop Rietzwood/celluloid veneers

cm scale in well of stock + tables of conversion factors on back - ex Shell (B.P.M.)

Nestler24bDesktop Extra Rietzwood/celluloid veneers

NOT demonstation model but engine-divided (Nestler only maker for desktops > 50cm) - read more ....​

Nestler24RDesktop Rietz - latewood/celluloid veneers

cm scale in well of stock + tables of conversion factors on back

Nestler27Desktop Precision long-scalewood/celluloid veneers

cm scale in well of stock+ tables of conversion factors on back - long scales (folded @ Pi) & desktop model meant accuarcy of 0.03%

Nestler28aDesktop Universal Topography 400gwood/celluloid veneers

tables of conversion factors on back - later replaced by 0286 Geometer

Nestler40aDesktop Business - latewood/celluloid veneers

Unusual scale layout + British pound sterling (£ s d) scales on back of slide + conversion tables on back

Orgelbau-Fachverlag(NoName)Desktop Music Organ Pipes - System Renschthin plastic

Made for German specialist publisher: Oreglbau-Fachverlag. For scaling organ pipes (wood metal flues & reeds) - orignal limited OEM higher-quality version by F-C. Table of frequencies on back.

Robson & Co., F.(NoName)Desktop Steel Weight Calculator - imperialboxwood

Little known UK (Newcastle on Tyne) instrument maker

Servo Calculator Co.Boonshaft & FuchsDesktop Frequency Responsemetal/plastic

After preloading 11 of 25 removeable slides the chosen scale layout can calculate a direct reading of amplitude ratio & phase v/s frequency of all terms in a complex transfer function for each of the 10 transfer function slides loaded

Stanley (London)GoochDesktop Gauge for Centering poly-slide (2)wood/metal

Invented & patented (GB189313940 - 1894) by Charles Gooch as an impoved gauge for centering & mounting photographic prints et al - the 2nd slide is attached on top of the slide in the stock by means of a metal sleeve/clamp ​

Stanley (London)Pilot Balloon Mark IIDesktop Meteorologywood/celluloid veneers

Meteorological Office (MO) No. 1979/43 - possibly made for Stanley by J.J. Hicks or A.G. Thornton - adoption of standard rates of ascent removed need for Mark I poly-slide (2) but 4th cursor needed for “tail method”

Stanley (London)Professor Fuller's Type 1 Calculating Slide Scale K3614Desktop helical long-scale brass/mahogany

Long Fuller Serial No. 4869 with conversion tables, natural sines and Birmingham Wire Gauge on inner fixed cylinder

Stanley (London)W.H. GlaserDesktop Textile Converion poly-slide (2)wood

Unusual fixed cursor extending the range of a relatively short scale length - read more ...

Systeem Matthijssen370Desktopwood/paper

Use/purpose of the many gauge marks is unknown - SR built into desktop stand for Nederlandse Kabelfabriek (NKF - Dutch cable factory in Delft)

Systeem Matthijssen386Desktop Technicalwood/paper

Use/purpose of the many gauge marks & scales is unknown - SR built into desktop stand

Thornton A.G. / P.I.C. / BritishA.G. (NoName)Desktop "prototype"wood/celluloid veneer

Unbranded but attributable to Thornton (horizontal/flat diamond box identification marks & reversed bottom edge scale) - traditional B scale replaced by upward pointing arrow - read more ...

Thornton A.G. / P.I.C. / BritishPIC 112Desktop Differential Rietzwood/celluloid veneers

Rietz type without Trig scales but with extra Thornton patented differential Trig scales - conversion tables on back

Thornton A.G. / P.I.C. / BritishPIC 122Desktop Differential Log-Logwood/celluloid veneers

Extra Thornton patented differential Trig scales - conversion tables on back

Thornton A.G. / P.I.C. / BritishPIC F 3651Desktop Electrical & Mechanical Engineer Electrowood/celluloid veneers

V & W scales in well of stock - conversion tables on back of stock

Thornton A.G. / P.I.C. / BritishPIC F 3756Desktop Mannheimwood/celluloid veneers

conversion tables on back

TombeurRadix 2/10Desktop Log - System Leibnizmahogany/paper + perspex

Decimal/10-bit binary (base/2/base 10) rule. Serial no. 019 blind-stamped in back

Troeger (Hans)(NoName)Desktop Pricingcardboard/plastic

Uncannily similar (visual & construction) to much earlier Swiss-made Lightning Calculator (Blitzrechner) of Ernst Billeter - extra % scale for discount &/or profit margin mark-up calculations - son of K. Emil Tröger who took over the company his father founded

Troeger (Karl Emil)Lung Volumes and BreathingDesktop Medical long-scalecardboard/wood

Standard values of AG Pathophysiologie d. Atmung - “1” in equilateral triangle = East German (DDR) post 1950 certification mark for “1st or good quality” - Karl Emil founded the company later taken over by son Hans - 8 mini specialist scales overlaid on D scale

Troeger (Karl Emil)Neues Deutschland (ND)Desktop Typography printing - System B. Burghardtcardboard/wood

Unmarked but obviously Karl Emil made - Neues Deutschland = East German daily newspaper - Cicero is a typographic unit of measure similar to a pica but with 15th century origins

Troeger (Karl Emil)No. 1 (ver. 37/393/6004) Desktop Basic pluscardboard/wood

“1” in equilateral triangle = East German (DDR) post 1950 certification mark for “1st or good quality” - Karl Emil founded the company later taken over by son Hans

UnknownNoel-BentleyDesktop Paper Roll Computor poly-slide (2)plastic

Robert Noel-Bentley design (patent CA489176 - 1952) for calculating (pre-shipment) physical characteristics of commercially manufactured large & heavy rolls of paper - possibly made by Blundell.

Unknown(NoName)Desktop Gunter Rulewood incised/brass pins

Invented by Edmund Gunter (1581-1626) - standard layout for a Gunter i.e. ​Diagonal scale on front face + full-length scales on back

Unknown(NoName)Desktop Steel Weight Calculator - imperialwood/printed paper

Wide-bodied & well made but otherwise no clues as to the maker​ - scale layout identical to Robson model

Unknown(NoName)Desktop Poly-slide (2) Steel Bars & Sections Weight Calculator - imperialthick plastic

Wide-bodied model possibly made by BH ​

Van Oosterhout, A(NoName)Desktop Replica Gunter Rulewood incised

Invented by Edmund Gunter (1581-1626) - replica made by KRING member Ton van Oosterhout ​- standard layout for a Gunter i.e. ​Diagonal scale on front face + full-length scales on back

W.H. Harling702Desktop Enhanced Mannheim - earlywood/celluloid

No makers name or logo - catalogued by Colin Barnes as “Lloyds Register Slide Rule” - table of constants on back

Wichmann Gebr.1919RDesktop Rietzwood/celluloid veneers

OEM by Nestler - cm scale in well of stock + hand-written list of formulas on back

William LangleyCarpenter TimberDesktop Coggeshallwood/brass

Rare rectilinear Coggeshall with 4–40 GIRT LINE for volumes of round timber + 2 sets of brass gauge pins (marked 0,16, 8 & 8,16, 0 respectfully) for round, 8 or 16 sided timber + INVERTED LINE (AI scale) for volumes of rectangular timber - compared to Dring & Fage version layout front & back reversed