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 Vest Pocket 
Mannheim Slide Rule

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.

.
Hemmi 34RK Five-Inch 
Pocket Mannheim
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.

.
Hemmi 149A Pocket Duplex
Engineering Slide Rule
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.
.
Hemmi 255D Electrical Engineering Slide Rule
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 photocopied 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 a new photocopy.

Brand new.

Includes
Slide Rule,
Leather Case,  Instructions. 

Price

$199.
.
 Hemmi 257L Chemistry Slide Rule

(rear of rule shown)
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
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." 

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

Photos here are out of date.  (I'll get them updated as soon as I can.)  Actual slide rule carries no brand name other than "Sun Hemmi Japan No. 259D."  Case is dark green and cream two-piece pasteboard with "Hemmi No 259D" shelf label on end.


Brand new.

Includes
Slide Rule,
Case, 
Instruction Manual.

Price
$108.

.
 Hemmi 260 Advanced Engineering Slide Rule
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 a new Photocopy.

We got a special buy on these slide rules and can pass the savings on to our customers. 

 Brand new, unused and sealed in original factory plastic.

Includes
Slide Rule,
Leather Case,
Instruction Manual.

Special Price
$175

.
Hemmi P261 Advanced Engineer (Darmstadt) Duplex
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 5mm 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, 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
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 5mm 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. 

Price
$137.

.
Hemmi 269 Civil Engineering Slide Rule
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.  Instructions are a new photocopy of original factory manual.

Brand new.

Includes
Slide Rule,
Leather Case,
Instruction Manual. 

Price

$210.
.
.

Used Slide Rules

No used rules available right now. 
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