| Type | ?
Generic name (e.g. Enhanced Mannheim) or function/use for special models (e.g. Meteorology). If not the “standard” 25cm linear length proceeded by the form (e.g. Demonstration, Desktop, Pocket, Waistcoat, Lilliput or Book) + suffix when needed to distinguish between different versions (e.g. early or late).
| 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/celluoid 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.
| 25cm |
|---|
| 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
| cm \ A / B,C / D | inch |
|---|
| 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
| / 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
| 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
| 1920s |
|---|
| Extras | ?
Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc
| black linen covered stiff carboard case with D&P box mark |
|---|
| 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
| Hollandia-Rekenstok = Dutch calculating stick - OEM version by Dennert & Pape & 1st slide rule in Ahrend catalogue - cm scale in well of stock + conversion tables (in NL) on back |
|---|
| In-Out | ?
MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known
| <2010/ |
|---|
