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


Graphoplex 612 Pocket Rietz

Details of: Graphoplex - 612

Type? Where possible the generic name preceded by the form if not 25cm/10” linear - e.g. Pocket Enhanced Mannheim. For specialty types, often supplemented by its use. Sometimes a suffix is also added to distinguish between versions of the same model. Pocket Rietz
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. 12½cm
Scales front? Mostly standardised (not maker’s) symbols for scales on front of stock 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 edge. cm \ K,A / B,CI,C / D,L
Scales back? Mostly standardised (not maker’s) symbols for scales on back of stock 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,ST,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 clear plastic - 1 non-central hairline + 3 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 1970s
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc brown stitched leather comb case with 612 in gold lettering + carboard box - image courtesy of PHOTOCALCUL
Instructions? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed French for 612, 615, 650 & 643
Booklet (PDF)? Downloadable .PDF copy of unusual or uncommon model specific instructions download
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

one open window right with 1 hairline in back

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:  Graphoplex new search?

(NoName) 615 Pocket Rietz - early
(NoName) 620 Rietz - early
16oo School Riez C.A.P. - early & all black
604 Typography Cicero printing
612 Pocket Rietz
620 (ver. 5) Rietz
620 d (ver. 1) Rietz
630 Geometre Surveying Topography - 400 g early
640 Electro Log-Log
643 Pocket Electro Log-Log
650 Pocket Electro
1600 School Rietz C.A.P.
1600 School Rietz C.A.P. - blue bands
1612 Pocket Rietz - early & all black
1614 Demonstration School Log-Log
1614 School Log-Log C.A.P.
1694 Technical
680 STATOS Reinforced Concrete - System Lüthy/Nussbaum
681 STATOS Pocket Reinforced Concrete - System Lüthy/Nussbaum
690 a Neperlog log-log
CALTEX Petroleum Rietz
DYNSTAT Desktop Impact Testing
Meteo No. 2 Meteorology - early & all black
Panneau Publicitae Demonstration/Display Log-Log
REVACO Hydralic/Pipes/Valves flow rates
REVACO II Hydralic/Pipes/Valves flow rates
SHELL Pocket Petroleum Central Heating Efficiency - NL version
SHELL Pocket Petroleum Central Heating Efficiency
SHELL-MEX/BP Pocklet Petroleum Stack-Loss
THERMOCOAX Metrology Electro