- 455 Martinson, Los Angeles
- 8 (043) 567 - 89 - 30
- support@email.com

Type | ? A generic name (e.g. Rietz) or function/use for specialist models (e.g. Meteorology) for grouping similar models across makers. If not “standard” 25cm linear length, preceded by the form (i.e. Demonstration, Desktop, Pocket, Waistcoat, Keyring, Lilliput or Book) + if needed, qualification to distinguish between versions (e.g. early or late). | Electro |
---|---|---|

Sort | ? L/C/D/T/W/X where L=Linear, C=circular, D=Drum, T=tubular, W=watch, X=miscellaneous (i.e. the rest) | L |

Construction | ? Basic construction form of the body i.e. Closed/solid frame or Open frame or Duplex or Other | Closed/solid frame |

Material | ? Basic description: ivory/bone/wood/bakelite/plastic/metal/cardboard or combinations e.g. wood/veneered, wood/painted, etc | plastic |

Length | ? Mostly the linear length of the D scale (in cm or inches) excluding any extensions. For circular/watch slide rules it is the diameter but for helical/tubular/drum slide rules it is the overall scale length. For other calculating aids it is the physical length. | 25cm |

Scales front | ? Standard (not maker’s) symbols for scales on front face e.g. A = X² (1-100) but § = generic symbol (signum sectiōnis) for any non-standard scale + scales between solidi / / are on the slide(s) whereas scales after vertical line | or after reversed solidus \ are on a straight or bevelled top or bottom side edge | inch | V,A / B,§,S,§,C / D,W,WI |

Scales back | ? Standard (not maker’s) symbols for scales on back face e.g. S = sine (5° to 90° & 85° to 0°) or sin(x) but § = generic symbol (signum sectiōnis) for any non-standard scale + scales between solidi / / are on the back of slide(s) but scales listed after / / - notation are on another surface e.g. back of stock or inside a lid | / S,ST,T / |

Cursor type | ? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus | chrome/plastic - 1 hairline + 2 peripheral hairlines |

Condition | ? Cn where n = 0-6 condition/quality scale where 0 = brand new in box & 6 = broken | C4 |

Date | ? YYYY for year(s) of production or an approximation/range of years | 1950 |

Extras | ? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc | large black hinged lined wooden case with metal clasps + cleaning slip inside |

Instructions | ? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed | English "Comprehensive" |

Booklet (PDF) | ? Downloadable .PDF copy of unusual or uncommon model specific instructions | download |

Comments | ? Any special or noteworthy traits + significant use-related facts + pertinent details of scales/tables in well of stock + any significant tables, etc on the back of the stock | 1 of 3 follow-on models replacing earlier E.3 Bakelite Electro - 2 slide tension adjustment screws on botton side edge + cm scale & patent no. 644944 on back |

In-Out | ? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known | 01-2020/ |

Model | Type |
---|---|

## Double Sharp | Steel Weight Calculator (Model A) |

0552-160219 | Military Torpedo Bearing Rate (Mark I Model 0) |

0552-160221 / P2297 | Military Torpedo Spreading poly-slide (2) |

304 | Academy Darmstadt |

308 | Academy Accountant's and Business |

310 | Pocket Academy Basic |

644944 / P5284 | Radiac Nuclear Fission Products poly-slide (2) |

6665-110060 (ver. NL) | Radiac Nuclear Radiation Calculator No.1 for land |

6665-110117 (ver. NL) | Radiac Nuclear Radiation Calculator No.1 for land |

6665-99-911-0117/0060 | Radiac Nuclear Radiation Calculator No.1 |

80543 | Omega Artillery Mils (MK2) |

AG2 | Rietz-like |

AL6 | Log-Log |

Blakeborough | Valve Sizing |

C24 D | Cost & Profit Reckoner Retail |

E.18 Electricians | Electro |

E.3 | Electro |

G.1 | Student Enhanced Mannheim without Trig scales |

G.1 (reject) | Student Enhanced Mannheim without Trig scales |

G.2 | Enhanced Mannheim without Trig scales |

G.2 | Enhanced Mannheim without Trig scales - early |

G.5 | Enhanced Mannheim |

Holophane | Angle Lighting Calulator |

Holophane | Illumination Lighting Calculator |

L.4 | Log-Log |

L.6 | Log-Log |

Laker | Cutting Speed/Feed Calculator |

P.8 | Pocket Mannheim |

P.8 | Pocket Mannheim - early |

P.8 | Pocket Mannheim - late |

P1409 | Holophane Illumination Calculator |

P1418 | Shell-Mex & BP Room Volume Calculator |

P1442 | Shell-Mex & BP Friction Loss Calculator |

P1454 | Pipe Flow |

P1470 | Conversion |

P1553 | Armstrong Calculator for Flooring |

P17 | Log-Log |

P1732/A | Fisher Valve Sizing Mark III F |

P1960/B | Paint Calculator (folded £-s-d scale) |

P2245 | Textile |

P2304 | Paper Substance Calculator |

P2327 (P4409) | Percentage Overlap on Metal Seams |

P2808 | Ultrasonic poly-slide (2) for testing metal buttt welds |

Paper Facts & Figures | Paper Calculating Rule |

S.101 | Pocket Rietz-like |

T.12 Technicians | Log-Log |

T.20 Technicians | Desktop Log-Log |

T.50 | Janus Multi Log-Log |

U.7 Universal | Log-Log |