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All The Rules...

Thus begins a comprehensive picture list of all the slide rules in my collection.   I have duplicates of many of the rules, but will only show one such sample if that happens, with the exception of the K&E rules.   Each K&E sample will be listed, since their long history and continuity of a model line will show the evolution of the production of those rules.   

Note:  This page is under-construction and samples are slowly being added.  Only a fraction of my rules yet appear here as of July 3, 2024.   

Aristo

Picture
Aristo Nr. 621 Circular - Front
Picture
Aristo Nr. 621 Circular - Back

Aristo Nr. 803 Mono-Rietz Pocket rule


​General Description: General purpose Student pocket rule
​
​Front Scales: L K A [ B CI C ] D S ST T
Back Scales: none
​

​Date Acquired: 

​​Serial Number or Date Stamp: 

Date: 1966 Lot#1
Country: Geretsried, Germany
Construction material: plastic
Case: 

Dimensions: Length of 1 decade = 5 in, and overall scale length = 5 in.
​The largest physical dimension is 6 in.


Notes: 

​

Picture
Nr. 803 - Front
Picture
Nr. 803 - Back
Aristo 0958 Geodat Surveyor rule


​General Description: Surveyor's rule with stadia scales.  400g version, measuring angles in "gons," where \(100 gons = 90 degrees\).  This is primarily a European feature, which treats angles as metrically-based measures.  Another version of this rule exists known as the 360, which uses traditional degrees. 
​
​Front Scales: ctg, T, arc, DF [CF, CIF, CI, C] D, P, S, C
Back Scales: 1-cos, 1-cos, A [ B,1/tan(a/2), sincos, cos2 ] D, L, K

​
​Date Acquired: 
​

​​Serial Number or Date Stamp: 
Date: 
Country: Germany
Construction material: plastic
Case: 

Dimensions: 25 cm (10 inches)


Notes: Duplex civil engineers or surveyors slide rule with stadia scales.​
Picture
0958 Geodat 400g - Front
Picture
0958 Geodat 400g - Back
Aristo 867 Darmstadt Pocket rule


​General Description: General purpose pocket rule
​Front Scales:  K A [ B BI CI C ] D P S T
Back of Sllde:  [ L LL1 LL2 LL3 ]
​Date Acquired: 

​​Serial Number or Date Stamp: 2LR06

Date: 1971, Lot#6
Country: Hamburg, Germany
Construction material: plastic
Case: Brown leather slip case with instruction pamphlet

Dimensions: Length of 1 decade = 5 in, and overall scale length = 5 in.
​The largest physical dimension is 6 in.


Notes: Top and bottom rules with transparent plastic; Reutlinger Company label

Picture
Nr. 867U Darmstadt - Front
Picture
Nr. 867U Darmstadt - Back

Picture
Nr. 965 Commerz II - Front
Picture
Nr. 965 Commerz II - Back

Concise

Picture
Model 271 - Front
Picture
Model 271 - Back
Picture
Concise No. 31 keychain circular rule for Nissan

Dietzgen

Picture
Redirule No. 1776

Picture
1778 Redilog Pocket Rule - Front
Picture
1778 Redilog Pocket Rule - Back

Diwa

Picture
851/4 Darmstadt - Front
Picture
851/4 Darmstadt - Back

Faber-Castell

Picture
2/83N Novo-Biplex - Front
Picture
8/10 Circular - Front
Picture
8/10 Circular - Back

Faber-Castell 62/83 Biplex


​General Description: General purpose pocket rule
​Front Scales: K T1 T2 DF [ CF CIF CI C ] D ST S P
Back Scales: LL03 LL02 LL01 W2 [W2' L C W1' ] W1 LL1 LL2 LL3
​Date Acquired: 

​​Serial Number or Date Stamp: 869

Date: August 1969
Country: Germany
Construction material: Geroplast plastic
Case: Green leather sheath

Dimensions: Length of 1 decade = 5 in, and overall scale length = 5 in.
​The largest physical dimension is 7 in.


Notes: Date code is difficult to read, so the date is approximate.

Picture
62/83 Biplex - Front
Picture
62/83 Biplex - Back

Picture
67/87R with Addiator - Front
Picture
67/87R with Addiator - Back

Picture
111/54 A Addiator Darmstadt - Front
Picture
111/54 A Addiator Darmstadt - Back

Graphoplex

Picture
615 Caltex - Front
Picture
615 Caltex - Back

Picture
698 Electronicien - Front
Picture
698 Electronicien - Back

Hemmi

Picture
Model 35ML - Front
Picture
Model 35ML - Back

Picture
Hemmi 250 General Computation - Front
Picture
Hemmi 250 General Computation - Back

Picture
Hemmi 251 Mechanical Engineering - Front
Picture
Hemmi 251 Mechanical Engineering - Back

Picture
Hemmi 255 Expert Electrical Engineering - Front
Picture
Hemmi 255 Expert Electrical Engineering - Back

Picture
Hemmi 255D Expert Electrical Engineering - Front
Picture
Hemmi 255D Expert Electrical Engineering - Back

Picture
Hemmi 256 Radio Communications - Front
Picture
Hemmi 256 Radio Communications - Back

Picture
Hemmi 259D Expert Mechanical Engineering - Front
Picture
Hemmi 259D Expert Mechanical Engineering - Back

Picture
Hemmi 266 Electronics - Front
Picture
Hemmi 266 Electronics - Back

Picture
Hemmi 274 General Engineering - Front
Picture
Hemmi 274 General Engineering - Back

Picture
Hemmi P281 Student Simplex Rule - Front and Back

Picture
Hemmi 410 "Involute of Gear Wheels" - Front
Picture
Hemmi 410 "Involute of Gear Wheels" - Back

K&E (Keuffel & Esser)


Picture
4088-1 Pocket Polyphase Duplex - Front
Picture
4088-1 Pocket Polyphase Duplex - Back

Picture
4097C Ever-There - Front
Picture
4097C Ever-There - Back

Picture
4097D Ever-There - Front
Picture
4097D Ever-There - Back

Picture
4139 Cooke Radio Rule - Front
Picture
4139 Cooke Radio Rule - Back

Picture
4168 Doric - Front
Picture
4168 Doric - Back

Picture
4181-1 Pocket Log Log Decitrig - Front
Picture
4181-1 Pocket Log Log Decitrig - Back

Picture
Deci-Lon 5 Model 68-1300 - Front
Picture
Deci-Lon 5 Model 68-1300 - Back

Picture
GP-12 Model 68-1565 - Front
Picture
GP-12 Model 68-1565 - Back

Logarex

Picture
27205 - Front
Picture
27205 - Back

Norma

Picture
Ronda 100 - Front

Pickett

Picture
B1 - Front
Picture
B1 - Back

Picture
N4-T

Picture
N4P-ES Pocket - Front
Picture
N4P-ES Pocket - Back

Picture
N16-ES Electronic

Picture
C19-T Collins Microwave Transmission - Front
Picture
C19-T Collins Microwave Transmission - Back

Picture
Model 100 Douglas Sky Rule - Front
Picture
Model 100 Douglas Sky Rule - Back

Picture
Model 101-C Dial-Rule - Front
Picture
Model 101-C Dial-Rule - Back

Picture
Model 103ES Mark-Up Calculator - Front
Picture
Model 103ES Mark-Up Calculator - Back

Picture
Model 106C Proportional Scale - Front

Picture
Model 111-ES Circular - Front
Picture
Model 111-ES Circular - Back

Picture
N200-T - Front
Picture
N200-T - Back

Picture
N300-T - Front
Picture
N300-T - Back

Picture
Model 400 - Front
Picture
Model 400 - Back

Picture
N600-ES - Front
Picture
N600-ES - Back

Picture
Model 700 USAF Aerial Photo - Front
Picture
Model 700 USAF Aerial Photo - Back

Picture
N808-T Standard Marine Fuels - Front
Picture
N808-T Standard Marine Fuels - Back

Picture
N1006-ES - Front
Picture
N1006-ES - Back

Post

Picture
Post 1441 - Front
Picture
Post 1441 - Back

Picture
Post Hemmi 1461 Electronic - Front
Picture
Post Hemmi 1461 Electronic - Back

Picture
Post 1461 Pocket Versalog 1 - Front
Picture
Post 1461 Pocket Versalog 1 - Back

Picture
Post 1461 Pocket Versalog 2 - Front
Picture
Post 1461 Pocket Versalog 2 - Back

Sans & Streiffe

Picture
No. 313 - Front
Picture
No. 313 - Back

SIC - Scientific Instruments Company

Picture
Star No. 25 for General Motors - Front
Picture
Star No. 25 for General Motors - Back

Picture
No. 1610-D Circular - Front
Picture
No. 1610-D Circular - Back

Staedtler

Picture
No. 54428 - Front
Picture
No. 54428 - Back

Standardgraph

Picture
Standardgraph Nr. 900 - Front
Picture
Standardgraph Nr. 900 - Back

​Unique

Picture
Unique Log Log Pocket - Front
Picture
Unique Log Log Pocket - Back

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Picture

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All images and content on www.allaboutastro.com
​are copyright by Jay Ballauer. 
​Permission for use and ​proper credit is required. 
© COPYRIGHT 2003 - 2025 ALL RIGHTS RESERVED.