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Details of: IWA (Ingenieurbuero fuer wirtschaftliches Arbeiten) - 0696 LANDIS & GYR

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 poly-slide (2)
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 multiple windows front & back
Condition? Cn where n = 0-6  condition/quality scale where 0 = brand new in box & 6 = broken   C1
Date? YYYY for year(s) of production or an approximation/range of years 1930-1960
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc
Instructions? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed Dutch briefly on back
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 specially commissioned by Swiss global energy management company Landis & Gyr for choosing most suitable servomotor 

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
01168 Clarkson Machining poly-slide (2)
01194 Hegenscheidt Machining
02114 TRILUX Lighting two--tone
02160 AEG-KABEL Cabling
0257 PIA ELECTRONIC Pocket Electronic (IWAFLEX)
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
0659 Eckardt Pipe Flow poly-slide(2)
0689 NELES Valve Sizing
0696 LANDIS & GYR Electro poly-slide (2)
07141 VÖTSCH Pocket Meteorology (IWAMATIC)
14127 Haffmans Beer Brewing
14162 Haffmans Beer Brewing
14350 ECG Cardiology
15 379 (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
51905 MK-rekenliniaal Pocket Electronic
52015 REINERS + FÜRST Pocket Textile
52314 ULTRAKUST Meteorology
5812 Carborundum Machining (IWAROTA)
RS 165 VDF Machining - early