THE SLIDE RULE TRADING CO., Paul Ross
Slide Rules for Sale

Brand New Slide Rules

These slide rules were purchased from retail stores or distributors or from collectors who bought them from a retail store or distributor.  They have been unsold on store shelves for 35-40 years and the boxes show shelf wear.  Boxes have been opened and the rule may have been examined by prospective buyers but it has never been in daily use.  The edges are sharp and the markings are crisp. All the original documents and accessories are included.  Except for rules described as "in original factory plastic," new rules have been freshly cleaned and aligned.  (But don't count on the rule maintaining alignment on its trip to you.)

Slide rules in original plastic bags have not been cleaned or aligned.  Some collectors, including myself, like having rules that have been sealed since they left the factory.  However, 35-40 years of storage have effect even on slide rules in sealed plastic bags:  The metal end brackets have dulled; the stators are usually out of alignment and some grit has deposited the celluloid surface.  The rules can be returned to 1970 condition with a wipe-down of Windex and metal polish on the end brackets.


Hemmi 32 Four-Inch
Vest Pocket  Mannheim Slide Rule

                           Click on picture to enlarge and sharpen it.

Four-inch closed-body bamboo slide rule with  magnifying cursor.   Scales are A [B, CI, C] D and [S, L, T] plus a 10-cm measuring scale on the top edge.    Complete, brand new package includes slide rule, brown leather sheath, 40-page factory instruction book, and shelf box.

Rule, case and box are brand new, factory perfect; instruction book has remnant of retail label on front cover, otherwise perfect.

Brand new.

Includes
Box, 
Slide Rule,
Leather Case,
Instructions.

Price
$81.

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Hemmi 34RK Five-Inch 
Pocket Mannheim


                                                              Click on picture to enlarge and sharpen it
.
Hemmi's "thin" pocket version of desk model 50 slide rule.  Scales A [B, CI, C] D, K and [S, L, T].  Plastic cursor provides moderate magnification.    Rule carries Odelco trademark on back; case has ODELCO embossed in gold.  40-page factory instruction book included.
 

Rule and case are brand new (rule is still sealed in factory plastic).  Instruction book has remnant of retail label on front cover, otherwise perfect. 

Brand new.

Includes
Slide Rule,
Leather Case,
Instruction Manual.

Price
$70.
Out of Stock

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Hemmi 149A Pocket Duplex
Engineering Slide Rule




                                                            Click on picture to enlarge and sharpen it
.

Hemmi's only pocket duplex slide rule--very similar to Post 1461 Pocket Versalog.  22 scales: LL/1, LL/2, LL/3, DF [CF, CIF, CI, C]  D, LL3, LL2, LL1 and L, K, A [B, TI, SI, C]  D, LL0, LL/0.


Rules are complete with factory instructions and Hemmi leather sheath--all in original Hemmi box.  Rule is marked "Hemmi No. 149A" and "ODELCO;" box is marked "SUN HEMMI NO. 149A, HEMMI SLIDE RULE."


Rule and case are perfect.  Boxes are slightly crushed and yellowed and cover of instructions shows slight yellowing.  Best boxes ship first.



Brand new, unused and sealed in original factory plastic.

Includes
Box,
Slide Rule,
Leather Case, 
Factory Instructions.

Price
$111.


Also available: One brand-new Hemmi 149A from a different source.  As above but not marked "ODELCO." Case and factory plastic included but plastic has been opened.  No box or instructions.    

Includes
Slide Rule,
Leather Case.
Price

$82
SOLD

.
Hemmi 255D Electrical Engineering Slide Rule
Click on picture to enlarge.
Very advanced duplex rule with hyperbolic scales.  Scales are L, K, DF [CF, CIF, CI, C]  D, LL3, LL2, LL1 and Sh2, Sh1, Th, A [B, TI2, TI1, SI, C] D, DI, chi, theta.   All the benefits of Hemmi's famous bamboo construction complete with brown leather case and 52-page Instruction Manual.  Rule is marked "ODELCO in addition to the usual "Hemmi No. 255D;" cases and instructions carry only the Hemmi name.

Rule is unused and still sealed in factory plastic.  Case is perfect.  Instructions are new photocopies.  

Brand new.

Includes
Slide Rule,
Leather Case,  Instructions. 

Price
$205

.
 Hemmi 257L Chemistry Slide Rule

Rear of rule shown.  Click on picture to enlarge.
Ten-inch duplex bamboo slide rule for chemists and chemical engineers.  Front scales (L, K, A, DF [CF, CIF, CI, C] D, LL3, LL2, LL1) are designed for efficient multiplication, division and exponentiation. Rear scales (Ch A-M, Ch N-Z, M1 [M2, ToF, ToC, ToK, LM]  mmHg, Kg/cm2, in hg Vac, tw) are designed for calculations involving molecular weight, temperature and pressure.  For example, the first two scales constitute a table of molecular weights;  setting the hairline on "H2O" automatically places the hairline on 18.3 (the molecular weight of water) on the D scale.  There are other scales which you can figure out since it comes with an instruction manual.  Complete with brown leather Hemmi flip-top case. 

Small ODELCO trademark on front of rule plus "HEMMI JAPAN NO. 257L" on back.  Frederick Post model 1491 Chemistry Rule was an earlier version of this rule. 

Rule is unused and still sealed in factory plastic.  Case is perfect.  Instructions are a photocopy of the original manual.

 Brand new and unused.
 
 

Includes
Slide Rule, 
Leather Case,
Instruction Manual.
 

Price
$376.

.
Hemmi 259D Mechanical Engineering Slide Rule

Click on picture to enlarge.
Final edition of the Hemmi 159/259/259D expert mechanical engineering slide rule.  Scales are LL/1, LL/2, LL/3, DF [CF, CIF, CI, C]  D, LL3, LL2, LL1 and L, K, A [B, T, S, ST, C]  D, DI, LL0, LL/0.   A beautiful bamboo duplex rule.  Complete with two-piece pasteboard Hemmi case and 49-page Instruction Manual.  Rule is marked "Hemmi No. 259D" with no other brand markings. 



Rule is unused and still in sealed factory plastic.  Case is unused but shows light yellow stains.  Instruction Manual is a new photocopy.


Brand new.

Includes
Slide Rule,
Case, 
Instruction Manual.

Price
$108.

.
 Hemmi 260 Advanced Engineering Slide Rule

Click on picture to enlarge.
Incredibly sophisticated bamboo duplex slide rule with a three-hairline cursor and 25 scales including LL/1, LL/2, LL/3, DF [CF, CIF, CI, C]  D, LL3, LL2, LL1 and LL/0, LL0, K, A [B, T, S, ST, C]  D, DI, P, L.  Complete with 49-page Instruction Manual and brown leather Hemmi case. Rule is marked "Hemmi No. 260" and "ODELCO;" case and instructions carry only the Hemmi name.

Rule is unused and still sealed in factory plastic.  Case is perfect.  Instruction Manual is factory original.


 Brand new, unused and sealed in original factory plastic.

Includes
Slide Rule,
Leather Case,
Instruction Manual.

$258

.
Hemmi P261 Advanced Engineer (Darmstadt) Duplex
Click on picture to enlarge.
An all-plastic duplex slide rule based on the "Darmstadt" scale set.   Scales are LL01, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2, LL1 and T, ST, K, A [B, BI, CI, C] D, L, P, S.  Rear of cursor has one full width hairline and three short hairlines.  Very advanced construction with 5 mm thick plastic body, no end brackets on face of rule, and end brackets on rear that hold the cursor away from the desktop.  Complete with plastic blow-molded case, 48-page factory instruction manual, and shelf box. 

The shelf box shows very slight wear at the edges; everything else is in true mint condition. 

Brand new, unused and sealed in original factory plastic.

Includes
Slide Rule,
Plastic Case,
Factory Instructions,
Shelf Box. 

Price
$135.

.
Hemmi P262 Advanced Engineer (Rietz) Duplex
Click on picture to enlarge.
An all-plastic duplex slide rule based on the "Rietz" scale set.  Scales are LL01, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2, LL1 and K, A, R1, R2 [T2, T1, ST, S, C] D, L, LL00, LL0.  Very advanced construction with  th5 mmick plastic body, no end brackets on face of rule, and end brackets on rear that hold the cursor away from your desktop.  Complete with plastic blow-molded case, 44-page factory instruction manual, and shelf box. 

Unlike illustration, the stators of these rules are pale blue; slide is medium blue as shown.  Everything is in true mint condition except boxes which range from like new to slightly crushed; best boxes ship first. 

Brand new, unused and sealed in original factory plastic.

Includes
Slide Rule,
Plastic Case,
Factory Instructions,
Shelf Box. 

Price
$137.

.
Hemmi 269 Civil Engineering Slide Rule
Back of rule shown.  Click on picture to enlarge.


Brand new, unused and in original factory plastic.  Ten-inch bamboo duplex slide rule with 25 scales for the Expert Civil Engineer: L, F, K, A [B, K', CI, C]  D, LL3, LL2, LL1 and CL, SL, M, TL [R, ST, T, S, C]  D, DI, SinCos(1), SinCos(2).  Complete with brown Hemmi leather case and 57-page Instruction Manual.  Rule is marked "Hemmi No. 269" in navy and "Civil" in bright red plus small ODELCO brand mark.


Rule is unused and still sealed in factory plastic.  Case is perfect.  Your choice of original factory printed or newly photocopied Instruction Manual.

Brand new.

Includes
Slide Rule,
Leather Case,
Instruction Manual. 

Price
$200 (Photocopied Instructions)
$210
(Factory Printed Instructions)

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.

Used Slide Rules

 
Pickett N1010-ES  Trig
Pic: Pickett N1010-ES with case
Click on picture to enlarge it.

An all-metal slide rule in Pickett's patented "Eye-Saver" yellow. Seventeen scales.  (Front: K, A [B, ST, T, S, C] D, DI.  Rear: DF [CF, CIF, CI, C] D, DI, L.)   Brown imitation leather sheath.


The slide rule end brackets have lost their shine due to age but nether the rule nor the case show any signs of use. (There is some illegible graffiti on case which has been polished over but is nevertheless detectable upon close inspection.)  



Used

Includes
Slide Rule, 
Imitation Leather Sheath. 

Price
$25.

.
Pic: Picket 600 with case.




Pickett 600
Pocket Slide Rule












Click on picture to enlarge it.

All-metal Pickett model 600 pocket slide rule.  22 scales.  Front: LL1 (two scales), A [B, ST, T, S, C] D, DI, K.  Rear:  LL2 (two scales), DF [CF, CIF, L, CI, C] D, LL3(two scales).  

Saddle leather case with pocket clip.  

Neither rule nor case show any sign of use.  The metal parts of the rule are still shiny.    



Used

Includes
Slide Rule,
Saddle Leather Case.

Price
$118
Sold

.

  Pickett 140 Microline
Pickett 140 Microline with case.
 
Click on picture to enlarge it.
  

A late-model Pickett slide rule of all-plastic construction.  22 scales.  Front: LL2, LL3, DF, [CF, DIF, L, CI, C] D, LL2+, LL3+.  Rear: LL1, K, A [B, S, ST, T, C] D, DI, LL1+.

Black imitation leather sheath.  (Color is solid black; scan process added some iridescent brown.)

No signs of use or age on rule or sheath..  

 
Used

Includes  
Slide Rule,
Imitation Leather Sheath.  

Price
$40
Sold

.
 
Pickett 120-T and 120-ES Microline
Pickett 120-ES with sheath

Pickett 120-T with case
Click on picture to enlarge it.



Late model all-plastic student slide rule with nine scales: K, A, [B, S, T, CI, C] D, L.  Back of rule is completely blank.  In "True-Color" white or "Eye-Saver" yellow.  Rules are identical except for color.  

Solid black imitation leather sheath.  (Scan process added some iridescent brown to image.)

Both rules are like new: No signs of use or age on rule or sheath.

Used

Includes
Slide Rule, 
Imitation Leather Sheath.

Price
$20 each
or
both for $35.

.
Post 1462H "Postrig"

Click on picture to enlarge it.
Post 1462H ("Postrig").  Front scales:  T, DF [CF, CIF. CI. C] D, S, ST.  Rear:  LL0, LL00, A [B, K, L, C] LL3, LL2, LL1  This was the first slide rule Hemmi designed specifically for the Frederick Post Company; it was the first step in the evolution of the "Versalog" slide rule.  Marked "Sun Hemmi Japan" with date code "BE."  The leather case is marked "Bamboo Slide Rule Sun Hemmi."  

This was one of the first Postrig rules made; BE (May 1951) is a very early date code and the Hemmi case implies that Post had not started producing their own cases for it.

Rule is in near mint condition.  No damage, no cracks, no defects of any kind.  Case  is excellent; the only signs of wear are flex marks in the leather flap closure.    

Used

Includes
Slide Rule, 
Case.

Price
$48

SOLD
.
Post 1461, Pocket Versalog
Click on picture to enlarge it


Post model 1461, Pocket Versalog.  23 scales!  Front: LL0, LL/0, K, DF [CF, CIF, CI, C] D, R1, R2, L.  Rear LL/1, LL/2, LL/3 [T T, SecT ST, Cos, S] D, LL3, LL2, LL1.  Marked "Frederick Post Co. 1461  Versalog  Hemmi Bamboo Japan."  Date code "LB" (February 1961) on top edge.  Leather case with pocket clip marked with Post logo and "Versalog."

Rule has been very well cared for and seems almost unused.  No chips, cracks, markings or discoloration.  Case is sound but edges are frayed, pocket clip seems loose, front top right corner has been repaired with leather patch on inside.  Back surface has been damaged by labeling tape.            

Click on picture to enlarge it            .

Used

Includes
Slide Rule, 
Case.

Price
$76
SOLD
.
Post 1444K Vest Pocket Slide Rule
Click on picture to enlarge it

Post 1444K, Vest Pocket Slide Rule.  (Made by Hemmi and sold in Japan and the rest of the world as Hemmi model 34RK.)  Nine calculating scales;  Front: A [B, CI, C] D, K.  Back of slide: [S, L, T].  Front markings: "The Frederick Post Co. No 1444K."  Rear: "Sun Hemmi Japan CE"  "CE " indicates that this slide rule was made in May 1952.   Brown leather case marked with Post logo and "1444-K" in gold.
     
Excellent condition.  No damage, no discoloration on either rule or case.  
Used

Includes
Slide Rule, 
Case.

Price
$15
.

Hemmi P280 / Teledyne Post 44BB-140  Beginner's Slide Rule

Click on picture to enlarge it

Hemmi P280/Teledyne-Post 44BB-140 all-plastic beginner's slide rule.  Dual-marked "Sun Hemmi Japan No P280" and "Teledyne-Post 44BB-140."  Thirteen scales.  Front: T, K, A [B, CI, C] D, L, S, ST.  On back of slide: LL1, LL2, LL3.  Date code "^XF" (June 1973).  With two-piece plastic case carrying Hemmi logo.  Case has "dimples" in both ends to suspend rule  in center without rubbing against sides.      

Rule is like new.  Case has lost its factory-new shine but is otherwise perfect.  



Used

Includes
Slide Rule, 
Case.

Price
$28

.
 
Dietzgen 1732 Maniphase Multiplex
 
Dietzgen 1732 with box.
 Click on picture to enlarge it.



Dietzgen 1732 Maniphase Multiplex Slide Rule.  ("Decimal trig type log log rule")  Front scales: L, LL1, DF, CF, CIF, CI, C] D, LL3, LL2.  Rear scales : LL0, LL00, A [B, T, ST, S] D, DI, K.  High quality celluloid on mahogany construction.  


Pasteboard case covered with imitation leather and genuine leather flap.  

Rule is like new.  Case shows minor wear on flap, otherwise the case is like new, too.  

Used

Includes
Slide Rule, 
Case.

Price
$40

.
 
Sterling Decimal Trig Log-Log Slide Rule


Sterling slide rule with case.
Click on picture to enlarge it.  



Sterling Plastics was a maker of modestly-priced  student slide rules; this is their top-of the line model.  Front scales: LL02, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2. Rear scales: LL01, K, A [S, T1, T2, ST, S] D, DI, LL1.

Sheath is high-quality nicely padded imitation leather.  

Neither rule nor sheath shows any sign of use or age.  

Used

Includes
Slide Rule, 
Imitation Leather Sheath.

Price
$25.
SOLD

.
Nestler 0137 with case



Nestler 0137
Pocket Electro Slide Rule











                                                              Click on picture to enlarge it.


An all-plastic pocket electro slide rule.  Front scales: Dynamo/Motor, Volt, A [B, CI, C]  Cos1, Cos2.  Back of slide: [sin, tg, tg2]. There is a 0-5 inch measuring scale on the upper, slanted, edge of the rule.  Cursor has four hairlines.  Rear of rule is imprinted "International Machine & Tool Corp."  

Brown leather sheath is carries gold logo of International Machine & Tool Corp.  

Both rule and sheath are in like-new condition except that logo on back of rule is badly printed.  (Bottoms of most letters are missing.)    
Used

Includes
Slide Rule, 
Genuine Leather Sheath.

Price
$45.

Sold
.
Diwa 601-1 with case




Diwa 601-1
Pocket Slide Rule


















                                                             Click on picture to enlarge it.

All-plastic pocket Rietz slide rule.  Scales: Front: K, A [B, CI, C] D, L.  Back of slide: [S, ST, T].  There is a combination cm-inch measuring scale on the top, slanted, edge.  Magnifying cursor has four hairlines. Back of rule carries advertising for International Latex and Chemical Company.  

Brown leather sheath has pocket clip and carries "Morningstar" logo. (A brand of the  International Latex and Chemical Company) in gold.

Blue unmarked shelf box.

Rule and shelf box are like new.  Sheath is like new except two small spots on pocket clip are roughened from contact with box.
Used

Includes
Slide Rule, 
Genuine Leather Sheath.

Price
$30.

SOLD

.
Aristo Nr 814 Pocket Elektro
Click on picture to enlarge it.
Aristo Nr 814 Pocket Elektro Slide Rule.  Very sophisticated all-plastic special-purpose slide rule.  There are measuring scales on the front (cm) and back (inches) of the top edge, seven calculating scales on the front of the rule, three on the back of the slide and two in the gutter.  There are four hairlines on the cursor and one on the transparent left end of the slide.   Special gauge marks for the conductivity of copper and aluminum.  Marked "Aristo Nr 814" and "Dennert & Pape, Hamburg."

Leather case is perfect fit but it is marked "A W Faber Castell."  

Both rule and case show few signs of wear.  No damage, discoloration or graffiti.  


Used

Includes
Slide Rule, 
Case.

Price
$27.
.
Castell 57/87 Student Slide Rule
Castell 57/87 with case and instructions
Click on picture to enlarge it.


Ten-inch all-plastic student slide rule with Rietz scales:  K, A [B, CI, C] D, L.  ([S, ST, T] on back of slide.)  Cursor has five hairlines.  Faber-Castel made this rule from 1952 until 1975; the date stamp on this rule is "64."

Two-piece transparent case with "Castell 57/87" end label and eight-page factory instruction booklet.



New

Includes
Slide Rule, Instructions, Plastic Case.

Price
$26.
Sold
.
Nestler No 21 Darmstadt Slide Rule
Nestler 21 with Case
Click on picture to enlarge it.

A marvelous old rule in spectacular condition.  Front scales: K, A [B, CI, C]  D, Cos.  [LL1, LL2, LL3] on back of slide.  (Scales are not labeled.)   0-27 cm and Log scale on top, slanted, edge and two more calculating scales (sin5o and tg5o) on bottom vertical edge.  There is also a measuring scale in the bottom of the well.  Cursor has three hairlines plus tab on top (for reading Log scale on top edge of rule) and a tab on bottom (for reading
sin5o and tg5o on bottom edge).  This is the only slide rule with calculating scales on both the top and bottom edges of which I am aware. 

Two-piece black pasteboard case which still carries inside label from original seller ("Wilhelm Fahrig, Braunschweig").  Case has been covered with brown fabric.  

Rule has yellowed with age but all marking are as clear and sharp as if they had been engraved this year.  No chips, wear, or graffiti.  Case has been neatly covered with a tightly-fitting custom-made cloth slipcover.  The slipcover may be glued to the pasteboard case.  The slipcover seems a bit dirty but shows no wear.       

I estimate the date of manufacture of this slide rule to be about 1922.  That is based on the celluloid veneer being screwed to the substrate and the general style of the rule; I can find no reference to Nestler model 21 anywhere.  Peter Hopp's earliest listing of Nestler rules is from a 1924 catalog; models 1 through 43 were listed but number 21 was one of several models omitted--perhaps because it had been discontinued in 1924 but my guess is because it was too expensive to generate substantial sales.  The cursor is of a design that was patented in 1937.  (DRP 650658)  The cursor carries no patent number, which implies that it was manufactured before the patent was issued.  The International Slide Rule Museum has photographs of models 21 with later cursor designs and without the veneer screws.    

Used

Includes
Slide Rule, 
Case.

Price
$86.
.
Castell 1/87 Rietz Slide Rule
Castell 1/87 with case
Click on picture to enlarge it.

Ten-inch "Rietz" slide rule.  Front scales: K, A [B, CI, C] D, L with [sin, sin/tg, tg] on the back of the slide.  Base wood is light colored (maple?), not the usual mahogany.   Faber Castell manufactured this model from 1935 to 1939.

Case is two-piece black pasteboard marked "A. W. Faber Castell, Syst. Rietz  1/87" in gold.    "1/87" is stamped in gold on end of case.

Rule is like new, case would be like new also if not for two or three places where the surface has lost its shine.    
Used

Includes
Slide Rule, 
Case.

Price
$25.
.
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