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Details of: IWA (Ingenieurbuero fuer wirtschaftliches Arbeiten) - 0759 KRONE

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). Meteorology
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 Duplex
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 the diameter but for helical/tubular/drum slide rules it is the overall scale length. For other calculating aids it is the physical length or LxWxH. 28cm
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 §,§ / § / §,§
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 §,§,§
Cursor type? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus double-sided plastic with 1 hairline + mini scale on back
Condition? Cn where n = 0-6  condition/quality scale where 0 = brand new in box & 6 = broken   C3
Date? YYYY for year(s) of production or an approximation/range of years 1965-1971
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc green plastic comb case + blind-stamped with KRONE triangle logo
Instructions? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed
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

Slide chart copyrighted design specially commissioned by German company KRONE for calculating relative humidity, etc + impressive nomogram on back

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known < 2005

All of:  IWA (Ingenieurbuero fuer wirtschaftliches Arbeiten) new search?

ModelType
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02114 TRILUX Lighting two--tone
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0272 Electronic two-tone (IWATRONIC)
0276 FERROXCUBE Electronic
03164 DRÄGER Pocket Medical Valve Sizing
05107 RIBE -Schraubenrechner Screw Selector
05136 FISHER Fisher Universal Valve Sizing Mark VI E
05155 Eternit Pipe Flow
0517 JAJOB FAULSTROH Screw Selector
06106 LOROMEIJ-GOOR Pipe Flow
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0682e HONEYWELL Valve Noise
0689 NELES Valve Sizing
0696 LANDIS & GYR Electro poly-slide (2)
IWA 07117 nedairco Air Conditioning
07141 VÖTSCH Pocket Meteorology (IWAMATIC)
07155 TROX Air Conditioning
0756 Enhanced Mannheim
0759 KRONE Meteorology
14127 Haffmans Beer Brewing
14162 Haffmans Beer Brewing
14350 ECG Cardiology
15379 (TF 65/2) Music Piano & Harpsichord Builders
15512 Cocktailwähler Lilliput Mixology
1633 Technical two-tone - System Wern
1640 Pocket Technical two-tone (IWAFLEX)
1660 Pocket Technical (IWAMATIC)
51455 Honeywell Valve Sizing
51903 MK-rekenliniaal Pocket Electronic - early
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52314 ULTRAKUST Meteorology
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