Under ConstructionMoving to a new home

All the Rules

Last updated: July 30, 2026

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.

This page is very much under construction. I will be adding history, scale and construction details for all rules at some point. Not all rules I own are pictured here.

Click a rule’s name to expand it and see its front and back photos.

Aristo

Nr. 621 Circular

Aristo Nr. 621 Circular, front

Front

Aristo Nr. 621 Circular, back

Back

Nr. 803 Mono-Rietz Pocket Rule

Aristo Nr. 803 Mono-Rietz Pocket Rule, front

Front

Aristo Nr. 803 Mono-Rietz Pocket Rule, back

Back

0958 Geodat Surveyor Rule

Aristo 0958 Geodat Surveyor Rule, front

Front

Aristo 0958 Geodat Surveyor Rule, back

Back

867 Darmstadt Pocket Rule

Aristo 867 Darmstadt Pocket Rule, front

Front

Aristo 867 Darmstadt Pocket Rule, back

Back

Nr. 965 Commerz II

Aristo Nr. 965 Commerz II, front

Front

Aristo Nr. 965 Commerz II, back

Back

Concise

Model 271

Concise Model 271, front

Front

Concise Model 271, back

Back

No. 31 keychain circular rule for Nissan

Concise No. 31 keychain circular rule for Nissan

Dietzgen

Redirule No. 1776

Dietzgen Redirule No. 1776, front

1778 Redilog Pocket Rule

Dietzgen 1778 Redilog Pocket Rule, front

Front

Dietzgen 1778 Redilog Pocket Rule, back

Back

Diwa

851/4 Darmstadt

Diwa 851/4 Darmstadt, front

Front

Diwa 851/4 Darmstadt, back

Back

Faber-Castell

2/83N Novo-Biplex

Faber-Castell 2/83N Novo-Biplex, front

8/10 Circular

Faber-Castell 8/10 Circular, front

Front

Faber-Castell 8/10 Circular, back

Back

62/83 Biplex

Faber-Castell 62/83 Biplex, front

Front

Faber-Castell 62/83 Biplex, back

Back

67/87R with Addiator

Faber-Castell 67/87R with Addiator, front

Front

Faber-Castell 67/87R with Addiator, back

Back

111/54 A Addiator Darmstadt

Faber-Castell 111/54 A Addiator Darmstadt, front

Front

Faber-Castell 111/54 A Addiator Darmstadt, back

Back

Graphoplex

615 Caltex

Graphoplex 615 Caltex, front

Front

Graphoplex 615 Caltex, back

Back

698 Electronicien

Graphoplex 698 Electronicien, front

Front

Graphoplex 698 Electronicien, back

Back

Hemmi

Model 35ML

Hemmi Model 35ML, front

Front

Hemmi Model 35ML, back

Back

250 General Computation

Hemmi 250 General Computation, front

Front

Hemmi 250 General Computation, back

Back

251 Mechanical Engineering

Hemmi 251 Mechanical Engineering, front

Front

Hemmi 251 Mechanical Engineering, back

Back

255 Expert Electrical Engineering

Hemmi 255 Expert Electrical Engineering, front

Front

Hemmi 255 Expert Electrical Engineering, back

Back

255D Expert Electrical Engineering

Hemmi 255D Expert Electrical Engineering, front

Front

Hemmi 255D Expert Electrical Engineering, back

Back

256 Radio Communications

Hemmi 256 Radio Communications, front

Front

Hemmi 256 Radio Communications, back

Back

259D Expert Mechanical Engineering

Hemmi 259D Expert Mechanical Engineering, front

Front

Hemmi 259D Expert Mechanical Engineering, back

Back

266 Electronics

Hemmi 266 Electronics, front

Front

Hemmi 266 Electronics, back

Back

274 General Engineering

Hemmi 274 General Engineering, front

Front

Hemmi 274 General Engineering, back

Back

P281 Student Simplex Rule

Hemmi P281 Student Simplex Rule, front and back

410 "Involute of Gear Wheels"

Hemmi 410 Involute of Gear Wheels, front

Front

Hemmi 410 Involute of Gear Wheels, back

Back

K&E (Keuffel & Esser)

4088-1 Pocket Polyphase Duplex

K&E 4088-1 Pocket Polyphase Duplex, front

Front

K&E 4088-1 Pocket Polyphase Duplex, back

Back

4097C Ever-There

K&E 4097C Ever-There, front

Front

K&E 4097C Ever-There, back

Back

4097D Ever-There

K&E 4097D Ever-There, front

Front

K&E 4097D Ever-There, back

Back

4139 Cooke Radio Rule

K&E 4139 Cooke Radio Rule, front

Front

K&E 4139 Cooke Radio Rule, back

Back

4168 Doric

K&E 4168 Doric, front

Front

K&E 4168 Doric, back

Back

4181-1 Pocket Log Log Decitrig

K&E 4181-1 Pocket Log Log Decitrig, front

Front

K&E 4181-1 Pocket Log Log Decitrig, back

Back

Deci-Lon 5 Model 68-1300

K&E Deci-Lon 5 Model 68-1300, front

Front

K&E Deci-Lon 5 Model 68-1300, back

Back

GP-12 Model 68-1565

K&E GP-12 Model 68-1565, front

Front

K&E GP-12 Model 68-1565, back

Back

Logarex

27205

Logarex 27205, front

Front

Logarex 27205, back

Back

Norma

Ronda 100

Norma Ronda 100

Pickett

B1

Pickett B1, front

Front

Pickett B1, back

Back

N4-T

Pickett N4-T, front

N4P-ES Pocket

Pickett N4P-ES Pocket, front

Front

Pickett N4P-ES Pocket, back

Back

N16-ES Electronic

Pickett N16-ES Electronic, front

C19-T Collins Microwave Transmission

Pickett C19-T Collins Microwave Transmission, front

Front

Pickett C19-T Collins Microwave Transmission, back

Back

Model 100 Douglas Sky Rule

Pickett Model 100 Douglas Sky Rule, front

Front

Pickett Model 100 Douglas Sky Rule, back

Back

Model 101-C Dial-Rule

Pickett Model 101-C Dial-Rule, front

Front

Pickett Model 101-C Dial-Rule, back

Back

Model 103ES Mark-Up Calculator

Pickett Model 103ES Mark-Up Calculator, front

Front

Pickett Model 103ES Mark-Up Calculator, back

Back

Model 106C Proportional Scale

Pickett Model 106C Proportional Scale, front

Model 111-ES Circular

Pickett Model 111-ES Circular, front

Front

Pickett Model 111-ES Circular, back

Back

N200-T

Pickett N200-T, front

Front

Pickett N200-T, back

Back

N300-T

Pickett N300-T, front

Front

Pickett N300-T, back

Back

Model 400

Pickett Model 400, front

Front

Pickett Model 400, back

Back

N600-ES

Pickett N600-ES, front

Front

Pickett N600-ES, back

Back

Model 700 USAF Aerial Photo

Pickett Model 700 USAF Aerial Photo, front

Front

Pickett Model 700 USAF Aerial Photo, back

Back

N808-T Standard Marine Fuels

Pickett N808-T Standard Marine Fuels, front

Front

Pickett N808-T Standard Marine Fuels, back

Back

N1006-ES

Pickett N1006-ES, front

Front

Pickett N1006-ES, back

Back

Post

Post 1441

Post 1441, front

Front

Post 1441, back

Back

Post Hemmi 1461 Electronic

Post Hemmi 1461 Electronic, front

Front

Post Hemmi 1461 Electronic, back

Back

Post 1461 Pocket Versalog 1

Post 1461 Pocket Versalog 1, front

Front

Post 1461 Pocket Versalog 1, back

Back

Post 1461 Pocket Versalog 2

Post 1461 Pocket Versalog 2, front

Front

Post 1461 Pocket Versalog 2, back

Back

Sans & Streiffe

No. 313

Sans & Streiffe No. 313, front

Front

Sans & Streiffe No. 313, back

Back

SIC - Scientific Instruments Company

Star No. 25 for General Motors

SIC Star No. 25 for General Motors, front

Front

SIC Star No. 25 for General Motors, back

Back

No. 1610-D Circular

SIC No. 1610-D Circular, front

Front

SIC No. 1610-D Circular, back

Back

Staedtler

No. 54428

Staedtler No. 54428, front

Front

Staedtler No. 54428, back

Back

Standardgraph

Standardgraph Nr. 900

Standardgraph Nr. 900, front

Front

Standardgraph Nr. 900, back

Back

Unique

Unique Log Log Pocket

Unique Log Log Pocket, front

Front

Unique Log Log Pocket, back

Back