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Details of: Nestler - 12b

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. Pocket Enhanced Mannheim
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 wood/celluloid veneers
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. 12½cm
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 a vertical line ( | ) or reversed solidus ( \ ) + a symbol denotes scale(s) on a straight or bevelled side edge. cm \ A / B,C / D | cm
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 solidi (/ /) are on the back of the slide(s). / S,L,T /
Cursor type? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus magnifying metal/glass - 1 hairline
Condition? Cn where n = 0-6 based on Herman van Herwijnen’s condition/quality scale C3
Date? YYYY for year(s) of production or an approximation/range of years 1907-1922
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc black linen covered box blind stamped 12b + A-N + resellers name of Adrian Brugger
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

cm scale in well of stock + table of conversion factors on back + 2 cursor windows

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known <2000/

All of:  Nestler new search?

ModelType
(NoName) Enhanced Mannheim
(NoName) Enhanced Mannheim - early
(NoName) Enhanced Mannheim - export Pickworth
(NoName) Mannheim
0121 Pocket Darmstadt two-tone
0123 Pocket Rietz
0123 Pocket Rietz two-tone
0127 Pocket International Conversion two-tone
0129 Polymath Pocket Log-Log
0137 Pocket Electro two-tone
0203 Alpha Demonstration Rietz
0210 Darmstadt
0210 Darmstadt
0215 Desktop Darmstadt 360°
0218 Darmstadt
0232 Rietz
0235 Desktop Rietz
0238 Rietz two-tone
0239 School Rietz
0249 Elemath School Log-Log
0251 Alpha School Rietz
0252 Beta School Technical
0253 Gamma School Technical
0254 Delta School Technical/Log-Log
0260 Machining
0270 Praezision Technical long-scale
0291 Polymath-Duplex Technical/Log-Log
0292 Multimath-Duplex Technical/Log-Log
0320 Crude Oil - System Dr. Schmeling
0330 Chemical two-tone
0370 Electro
0408 Fanance
0432 Reinforced Concrete - System Dr. Schaeffer
0440 Reinforced Concrete - System Maarschalk
10 Enhanced Mannheim
11 Pocket Enhanced Mannheim
11D Pocket Darmstadt
11E Pocket Enhanced Mannheim
11M Pocket Enhanced Mannheim
11O Pocket Mannheim
11R Pocket Rietz
11ZE Pocket Electro
11ZM Pocket Enhanced Mannheim
11ZR Pocket Rietz
12 Pocket Enhanced Mannheim
12a Pocket Enhanced Mannheim
12b Pocket Enhanced Mannheim
12c Pocket Enhanced Mannheim
17 Extra long Enhanced Mannheim
18 Desktop Enhanced Mannheim
21 Darmstadt
21a Desktop Darmstadt 360°
22 Pocket Rietz
23 Rietz
23a (A/R) Desktop Rietz - late
23R Rietz
23R/3 Rietz
23R/3 Rietz - early
24 Desktop Rietz
24b Desktop Extra Rietz long-scale
24R Desktop Rietz - late
24R/1 Desktop Extra Rietz long-scale
26 Business & Machining
27 Praezision Desktop Technical long-scale
28a Desktop Universal Topography - 400g
3 Mannheim
33 Chemical
37 Electro
37 Electro - early
37/15 Pocket Electro
39 Aviation Flight Computer
39 Pocket Electro - Sytem Besser
4 Enhanced Mannheim
40 Retail & Monetary
40 Retail & Monetary - early
40a Desktop Retail & Monetary - late
41 Lilliput Enhanced Mannheim
42Z Lilliput Mannheim
43 Reinforced Concrete - System Hoffmann
45 Desktop long-scale
5 Mannheim
8 Rietz
9 Rietz
A.B.C Military Tank Artillery
ABC Pocket Military Radiation
ABL Military Vehicle Logistics & Supply
Glanzstoff Pocket Textile
Hoehenwindmessung Desktop Military Artillery Range Finding/Meteorology
Landis & Gyr Pocket Mannheim
Rietz-S Pocket Rietz two-tone
RL 130 Mannheim-like
Sytem Rietz Rietz
Total Stralenschutz Pocket Radiation