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IWA – F. Riehle GmbH & Co KG: 15379 (TF 65/2)

IWA 15379 (TF 65/2) Music Piano & Harpsichord Builders

Details of: IWA – F. Riehle GmbH & Co KG - 15379 (TF 65/2)

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). Music Piano & Harpsichord Builders
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 plastic
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. 32cm
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 plastic - 1 hairline + 5 peripheral hairlines
Condition? Cn where n = 0-6 based on Herman van Herwijnen’s condition/quality scale C1
Date? YYYY for year(s) of production or an approximation/range of years 1978
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc black thick plastic slipcase
Instructions? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed English, German, French & Italian with tables for converting between American, English & German wire sizes
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

Specially commissioned (2500 made) & exclusively sold by German music retailer Verlag Erwin Bochinsky ​(trading name Verlag Das Musikinstrument) + based on earlier prototype by German master piano builder Klaus Fenner for wound & unwound strings + calibrated for imperial & metric sizes + table on back for recalibrating steel core wound strings - part of sundry applications series

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

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