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LOGA: 75E

LOGA 75E Desktop Basic

Details of: LOGA - 75E

Type? Usually a generic name preceded by the form if not standard linear length - e.g. Pocket Enhanced Mannheim. For special models often supplemented by its function/use - e.g. meteorology. Sometimes a suffix is needed to distinguish between different versions - e.g. early or late. Desktop Basic long-scale
Sort? L/C/D/T/W/X where L=Linear, C=circular, D=Drum, T=tubular, W=watch, X=miscellaneous (i.e. the rest) C
Construction? Basic construction form of the body i.e. Closed/solid frame or Open frame or Duplex or Other Other
Material? Basic description: ivory/bone/wood/bakelite/plastic/metal/cardboard or combinations e.g. wood/veneered, wood/painted, etc aluminium/paper/bakelite
Length? Mostly length in cm or ” (inches) of the D scale but excluding any scale extensions. But for circular or watch slide rules it is the diameter & for tubular or drum slide rules it is the overall linear scale length. For other mechanical aids it is the physical length. 75cm
Scales front? Standard (not maker’s) symbols for scales on front face e.g. A = X² (1-100) but § = generic symbol 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 D / C
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 for any non-standard scale + scales between solid / / 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 plastic/metal radial - 1 hairline
Condition? Cn where n = 0-6 based on Herman van Herwijnen’s condition/quality scale C4
Date? YYYY for year(s) of production or an approximation/range of years 1935-1975
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc metal desk stand/foot - image courtesy of Nico Smallenburg
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

Model suffix “E” = Einfach/elementary - see also smaller sibling

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known <2010

All of:  LOGA new search?

ModelType
15m (ver. E) Desktop Basic long-scale
2,4m (ver. E) Desktop Basic long-scale - yellow
30E (ver. 2) Basic
30RC (ver. 2) Business
30RZh Retail/Conversion
30sR (ver. 2) Basic+
30sT Technical
30Tt/360º Technical
7,5m (ver. E) Desktop Basic long-scale - white
75E Desktop Basic long-scale
75EA Desktop Basic/Monetary/Conversion long-scale
75RZ (ver. 2) Desktop Retail/Conversion long-scale
75T Desktop Technical long-scale
K150d Pocket Technical/Business Rietz-like
K300d Technical/Business
Topo (ver. 2) Military Artillery Mils - early
Topo (ver. 3) Military Artillery Mils
Wetter (30E) Basic