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.  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 some metal polish on the end brackets and a wipe-down with Windex.
Hemmi 32 Four-Inch
Vest Pocket  Mannheim Slide Rule


   Click on picture to enlarge.

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,
Factory Instructions.

Price
$88.

.
Hemmi 34RK Five-Inch 
Pocket Mannheim




Click on picture to enlarge.
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 instruction book included.
 

Rule and case are brand new (rule is still sealed in factory plastic).  Instruction manual is a new photocopy.   

Brand new.

Includes
Slide Rule,
Leather Case,
Instruction Manual.

Price
$70.

.

Hemmi 149A Pocket Duplex

Engineering Slide Rule
 (with wrong case)



Click on picture to enlarge.

Hemmi's only general-purpose 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.


Everything is new and factory original:
rule, leather case, factory instructions and shelf box.   The case is brown leather embossed with the HEMMI logo, as shown here, but in addition, both sides of the case are lettered in gold:   "HOMMA METAL WORKS CO., LTD." on one side and ten Japanese characters on the other.  Rule is marked "Hemmi No. 149A" and "ODELCO."


Rule, case and shelf box are perfect.  Cover of instructions shows slight yellowing.

Brand new, unused and still  sealed in original factory plastic.

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

Price
$140.
$100.

.
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
$235

.
 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.
 
 

Includes
Slide Rule, 
Leather Case,
Instruction Manual.
 

Price
$388.

.
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, still sealed in original plastic.  Complete with factory leather case and 49-page factory instruction manual in English.   

Also available: One new Hemmi 259D, unused and still sealed in factory plastic in unused but slightly stained two-piece pasteboard case.  (See picture at right.) Instruction Manual is new photocopy.  One only.         $120.  Sold.


Brand new.

Includes
Slide Rule,  Factory Leather Case and Factory  Instruction manual.    

$220.

.
 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 factory Instruction Manual and brown leather Hemmi case. Rule is marked "Hemmi No. 260" and "ODELCO;" case and instructions carry only the Hemmi name.



 Brand new, unused and sealed in original factory plastic.

Includes
Slide Rule,
Leather Case,
Instruction Manual.

$280

.
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.  Everything in mint condition.
Brand new, unused and sealed in original factory plastic.

Includes
Slide Rule,
Plastic Case,
Factory Instructions,
Shelf Box.
$162

.
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 5 mm thick 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.
$162.
SOLD



.
Hemmi 266 Electronics Slide Rule
Hemmi 266 Front
Hemmi 266 Rear
Click on picture to enlarge.
Hemmi 266 with case and instructions Brand new, unused and in original factory plastic.  Ten-inch bamboo duplex slide rule with 25 scales for the Expert Electronics Engineer.  The 13 scales on the front are for calculations involving multiplication, division, trigonometry, natural and common logarithms.  The 12 scales on the reverse are specialized for calculations involving impedance, reactance, resonant frequency, etc.  (I don't know what some of the scales are for.)
  
   
Complete with brown Hemmi leather case and 64-page Instruction Manual.  Rule is marked "ELECTRONICS" and SUN HEMMI JAPAN NO 266 plus a small Odelco trademark at the right end of the slide.  (Not shown in photographs above.)   

Rule is unused and still sealed in factory plastic.  Case is perfect.  Instruction Manual is a recent photocopy of the factory original.





Brand new.

Includes
Slide Rule,
Leather Case,
Instruction Manual. 

$330
.
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 factory-printed 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. 

Brand new.

Includes
Slide Rule,
Leather Case,
Instruction Manual.


$267

.
Cardiothoracic Slide Rule

Click on picture to enlarge.
Special purpose slide rule made by Hemmi ca 2000.  Transparent top scale (0-32 cm) is for taking measurements directly from x-rays or other medical images.  Bottom consists of a simple all-plastic slide rule for calculating various ratios.  Overall size: 4.25 x 31 inches.  Labels are in Japanese.

Brand new in black vinyl sheath with factory original instructions.  (Single page in Japaese.)     


Indispensable if you are a Japanese radiologist.     
New

Includes
Slide Rule, 
Sheath.

Price
 $40

Used Slide Rules

Hemmi P33/SS / Geotec 341-3610 


Click on picture to enlarge.

Elegant all-plastic pocket slide rule made by Hemmi and sold by Geotec (Canada).  Marked only "SUN  HEMMI  JAPAN NO. P33/SS" on rule but sheath is stamped "GEOTEC 341-3610" in gold.  

Scales are 125 mm long; overall size is 150 x 26 x 4 mm.
 
Improved Mannheim scales: A [B, CI, C] D, K on front; [S, L, T] on back of slide.  Back of rule is entirely blank.

Unused (from a private collection) but there is a small red stain on face of rule near the "J" in JAPAN.  See picture.
Used
 
Includes
Slide Rule, Sheath.

 Price
$30.

Hemmi 250 Duplex Slide Rule
 
Click on picture to enlarge.

A basic duplex bamboo slide rule by Hemmi.  Front scales: DF [CF, CIF, CI, C]  D, L.  Rear scales: K, A [B, TI2, TI1, SI] D, DI.  This was Hemmi's basic, all-purpose, duplex slide rule after world war II.  (Date code "OI," September 1964.)  Unusual black anodized end brackets.          




Brown leather Hemmi case with small factory label on back "SUN HEMMI NO 250" and small handwritten label "£ 5.80."

Forty-four page instruction manual.  

Rule and case are in absolute mint condition.  Instruction manual is a new photocopy of factory original.   
Used

Includes
Slide Rule, Instructions, Leather
Case.

Price
$80.
Sold

.

Hemmi P253 "Vectolog" / Geotec 341-3130 


Click on picture to enlarge.

Professiomal engineer's all-plastic duplex slide rule.  Complete with molded case, 48-page instruction manual, and shelf box.  

 Marked "SUN HEMMI JAPAN 341-3130" plus Geotec logo on left end of rule; "HEMMI Vectolog" on right end, and date code "UG" (July 1970) embossed into bottom edge.  Overall dimensions: 13.25 inches x 41 x 5mm.   Front scales: LL3, LL2, DF [CF, CIF, CI, C] D, L, LL1.  Rear scales: K, A [B, TI2, TI1, SI] D, DI.

Comes from a private collection.  Rule and case are like new.  Instruction manual is a little dog-eared but there is no indication that it has ever been read or, even, opened.  Shelf box is badly worn: both end panels have been torn off. (One is included but the other is missing completely.)  
Used
 
Includes
Slide Rule, Case, Instruction Manual, Shelf Box.

 Price
$60.






Hemmi P280 / Geotec 341-3645 

Click on picture to enlarge.
All-plastic beginner's open-body slide rule with molded case.

Marked "Geotec 341-3645" and "SUN HEMMI JAPAN NO.P280"  Scales are "Darmstadt." (Front: T, K, A [B, CI, C] D, L, S, ST.  There are no scales on the backs of the stators. Back of slide: [LL1, LL2, LL3].  Slide must be turned over and reinserted in rule to use rear log-log scales.)  Cursor has four hairlines for quick conversions between hp and kW, etc.  No date code. (Hemmi manufactured this rule from about 1959 to 1972.)  

Both rule and case are like new.       
Used
 
Includes
Slide Rule, Case.

 Price
$30.




How to Order Home  | Slide Rules  |   Hemmi & Post Parts  |   K & E Parts  |  Dietzgen, Pickett, R/R Parts  |  Books & Literature  |  Cases & Boxes  |   Msc Links
  Hemmi Catalogue Raisonne  |    Hemmi Cat II   |    Frederick Post Cross Reference
Like Slide rules?  Join the Oughtred Society.