• 455 Martinson, Los Angeles
  • 8 (043) 567 - 89 - 30
  • support@email.com
  • Unusual non-logarithmic squaring desktop QR 41 model by Dennert & Pape (D&P)
  • Colour combinations slide rule for Interior Designers
  • Professor Fuller’s Drum Calculator from 1878 - made by W.F. Stanley
  • Modern Kienzle wristwatch with slide rule bezel calculator
  • Ruxton Multi-Vider drop-lead pencil & slide rule
  • Rare Otis King Model N for Retail & Monetary with white scales (422 & 424) on a black background
  • Darnley’s Rotable Lightning Calculator/Pencil Case
  • Design for this Antenna Radar Beam Pattern Detection slide rule was classified during WWII by UK & US governments - made by Lawrence
  • Makeba Kombinator pencil & slide rule
  • Rare Carbic-made Fischer Calculator
  • Specialist slide rule for a national home cable radio broadcasting system offered in The Netherlands in the 1900s
  • Smallest drum (≈ 2.4m) made by LOGA

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Search results: Click on any Model listed in the left-hand column for its full specification OR hover over its "Thumbnail" (if shown) for a pop-up enlargement of the image

You searched for: Hemmi
ModelTypeMaterialCommentsThumbnail
1 Enhanced Mannheim bamboo/celluloid veneers

Branded on front but no discernable model no. but part of obsolete 1-18 range of model no.'s abandoned circa 1930 + cm scale in well of stock + metal backing plate & paper table of conversion factors/scale on bac

Hemmi 1 Enhanced Mannheim
1/1 Enhanced Mannheim bamboo/celluloid veneers

Part of obsolete 1-18 range of model no.'s abandoned circa 1930 + metal backing plate & paper table of conversion factors/scale on back

Hemmi 1/1 Enhanced Mannheim
101A Demonstration Enhanced Mannheim wood/painted

Classroom version for models 40RK & 43A - Sun was added later as company logo ​

Hemmi 101A Demonstration Enhanced Mannheim
130 Darmstadt bamboo/celluloid veneers

Branded in well but no discernable model no. + unusually extra S,T scales on the bottom side edge + metal backing plate & plastic table of conversion factors on back

135 Pocket Darmstadt bamboo/celluloid veneers

metal backing plate

136 Pocket Darmstadt bamboo/celluloid veneers

unusually extra S,T scales on the bottom side edge + metal backing plate & plastic table of conversion factors on back

Hemmi 136 Pocket Darmstadt
149A Pocket Log-Log bamboo/celluloid veneers

branding on back of stock + A model no. suffix = additional catalogue/bookkeeping listing but otherwise no change to 149   

Hemmi 149A Pocket Log-Log
255D Electro Hyperbolic bamboo/celluloid veneers

For Electrical Engineering + D model no. suffix = with DI scale but otherwise replaced 155 + metal end braces

Hemmi 255D Electro Hyperbolic
259D Log-Log bamboo/celluloid veneers

branding on back of stock + metal end braces + D model no. suffix = with DI scale but otherwise identical to 259

Hemmi 259D Log-Log
260 Log-Log bamboo/celluloid veneers

metal end braces + WULFF & UNIVERSITY with branding stamped into both side edge

Hemmi 260 Log-Log
2640 Enhanced Mannheim bamboo/celluloid veneers

Reissued version of model 50W for post 1940 2600 series with the K scale unusually delegated to back of slide + metal backing plate & plastic table of conversion factors on back

Hemmi 2640 Enhanced Mannheim
2664S Technical bamboo/celluloid veneers

Cobranded with Masoneilan + S model no. suffix possibly = 2664 with supplementary green coloured CIF scale + metal backing plate & plastic table of conversion factors on back

Hemmi 2664S Technical
2690 Surveying - 360 bamboo/celluloid veneers

metal backing plate & plastic table of conversion factors on back

Hemmi 2690 Surveying - 360
275 Desktop Hyperlog Electro (ver 1) bamboo/celluloid veneers

Desktop version of 25cm model 255 - ​§ scales on front face for converting degrees into radians & vice-versa - supposedly for Advanced Electrical Engineers.

Hemmi 275 Desktop Hyperlog Electro
279 Desktop Expert Mechanical Engineer bamboo/celluloid veneers

metal end braces - desktop version of 259​

Hemmi 279 Desktop Expert Mechanical Engineer
30 Lilliput Enhanced Mannheim wood/metal/celluloid veneers

Promotional model for Swedish company + metal backing plate

30 Lilliput Enhanced Mannheim - late bamboo/celluloid veneers

Metal backing plate

301 Frequency Response bamboo/celluloid veneers

Design invented by Prof. Keisuke Izawa of Tokyo Institute of Technology for frequency responses of physical systems where transfer functions can be linear & exponential + extremely complicated to use with multiple cursors + metal backing plate + see also advanced sibling 301A 

Hemmi 301 Frequency Response
301A Frequency Response bamboo/celluloid veneers

Designed  by Prof. Keisuke Izawa of Tokyo Institute of Technology for frequency responses of physical systems where transfer functions can be linear & exponential + overlay co-developed with Tomoaki Morinaga especially for quadratic factor + extremely complicated to use with multiple cursors/overlay +  metal backing plate + see also “basic” sibling 301 

Hemmi 301A Frequency Response
32 Lilliput Enhanced Mannheim bamboo/celluloid veneers

Identical to model 30 but given model no. 32 because of magnifying cursor + red logo on right-hand end of slide = retailer's trademark + metal backing plate

Hemmi 32 Lilliput Enhanced Mannheim
32R (POST 1441) Lilliput Enhanced Mannheim bamboo/celluloid veneers

Model no. suffix R = with reciprocal CI scale (suffix later dropped) + co-branded on back POST 1441 + metal backing plate

Hemmi 32R (POST 1441) Lilliput Enhanced Mannheim
34 Pocket Mannheim bamboo/celluloid veneers

metal backing plate stamped with “G. DIKKES & Co N.V.”

34P Pocket Mannheim bamboo/celluloid veneers

significance of the P model no suffix not known + metal backing plate stamped with “BYGGNADS AB JOHAN GUSTAFON & SONER”

Hemmi 34P Pocket Mannheim
34R Pocket Enhanced Mannheim bamboo/celluloid veneers

branded on front but no discernable model no. + R model no. suffix = basic 34 with reciprocal CI scale + metal backing plate

34RK Pocket Rietz-like bamboo/celluloid veneers

RK model no. suffix = basic 34 with reciprocal CI & K scale + metal backing plate

34T Pocket Enhanced Mannheim bamboo/celluloid veneers

T model no. suffix possibly = basic 34 with Trig scales + metal backing plate stamped with “SUN”

34T Pocket Enhanced Mannheim - late bamboo/celluloid veneers

T model no. suffix possibly = basic 34 with Trig scales + plain (no SUN or ASEA stamping) metal backing plate

35 Lilliput Enhanced Mannheim bamboo/celluloid veneers

metal backing plate stamped BOFORS

Hemmi 35 Lilliput Enhanced Mannheim
40 Enhanced Mannheim bamboo/celluloid veneers

branded on front face  but no discernable model no. + metal backing plate & plastic table of conversion factors on back

40RK Rietz-like bamboo/celluloid veneers

RK model no. suffix = basic 40 with reciprocal CI & K scale + metal backing plate

50 Enhanced Mannheim bamboo/celluloid veneers

same as 4x models but with an extra CI scale + metal backing plate

64/3 Enhanced Mannheim bamboo/celluloid veneers

/3 model no. suffix = 3-line cursor + later siblings

642T Rietz bamboo/plastic/celluloid veneers

Wider version of 64T Extended Rietz + T model no. suffix possibly = basic 64 with extra Trig scales + cobranded Dutch retailer Ahrend on front face + table of constants & green pads on back + earlier thinner 64T sibling - also sold as Ahrend 643T

Hemmi 642T Rietz
64T Rietz bamboo/celluloid veneers

considered extended version of the basic Rietz 64 because of additional scales + T model no. suffix possibly = basic 64 with extra Trig scales + later broader 642T sibling + metal backing plate & plastic table of conversion factors on back

Hemmi 64T Rietz
70 Desktop Improved Rietz bamboo/celluloid veneers

Branded in well but no discernable model no. + table of conversion factors on back - also sold as Tamaya 4480 

Hemmi 70 Dekstop Rietz
74 Pocket Rietz bamboo/celluloid veneers

branding on back of stock + metal backing plate

74 Pocket Rietz - late bamboo/celluloid veneers

Considered an improved layout because of extra peripheral hairlines on cursor + metal backing plate + Dutch retailer Ahrend printed on back

80/1 Electro - imperial bamboo/celluloid veneers

branded in well but no discernable model no. + W,V scales in well + /1 model no. suffix = 1-line cursor + metal backing plate

Hemmi 80/1 Electro
80/3 Electro - metric bamboo/celluloid veneers

branded in well but no discernable model no. + W,V scales in well + /3 model no. suffix = 3-line cursor + metal backing plate & plastic table of conversion factors on back

Hemmi 80/3 Electro
86/3 Pocket Electro bamboo/celluloid veneers

branded in well but no discernable model no. + W,V scales in well + /3 model no. suffix = 3-line cursor + metal backing plate & plastic table of conversion factors on back

Hemmi 86/3 Pocket Electro
Foxboro Pipe Flow & Valve Sizing - metric plastic

Maker's branding only stamped into cursor + 3rd party dual branding with econosto n.v. + green end braces & Reynolds No. on back +  

Hemmi Foxboro Pipe Flow & Valve Sizing - metric
P24 Student Technical plastic

P model no. prefix = plastic + green coloured end braces

Hemmi P24 Student Technical
P261 Log-Log plastic

Green end braces & cursor trim

Hemmi P261 Log-Log
P280 Darmstadt-like two-tone plastic
P281 Rietz-like two-tone plastic
P40RK Enhanced Mannheim plastic

Dark-grey end braces with cursor windows

P45K Technical plastic

P model no. prefix = plastic & K model no. suffix = addition of K scale to basic 45 but other than being  open-frame, identical to 45K + green coloured end braces

Hemmi P45K Technical
P45S Technical plastic

All plastic version of 45K + /S model no. suffix = simplified version of P45K

Hemmi P45S Technical