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

LOGA Calculator A.G.: 7.5m (ver. E)

LOGA 7.5m (ver. E) Desktop Basic long-scale - white

Details of: LOGA Calculator A.G. - 7.5m (ver. E)

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). Desktop Basic long-scale - white
Sort? L/C/D/T/W/X where L=Linear, C=circular, D=Drum, T=tubular, W=watch, X=miscellaneous (i.e. the rest) D
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 metal/paper
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. 750cm
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 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 (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 none - not needed
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 1900-1935
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc Stylised LOGA name on black metal desk stand - 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 German (photocopy)
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

Serial No. 751030 (“75” correlates to scale length & “1030” = no.) + version “E” = Einfach/elementary

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 Calculator A.G. new search?

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 (ver. 1) Technical
30Tt/360º Technical
30Tt/360º Technical - early
7.5m (ver. E) Desktop Basic long-scale - white
75 Praezision 6400 A 0/00 Desktop Military Artillery/Stadia Topography
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 6400 A 0/00 (ver. 2) Military Artillery/Stadia Topography - early
Topo 6400 A 0/00 (ver. 3) Military Artillery/Stadia Topography
Wetter (30E) Basic