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FABER-CASTELL   POCKET-RIETZ   ( 12.5 cm Scales )



A.W.Faber-Castell, Stein bei Nuernberg / Germany      (1970)
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                                                 VERSION (A)

S C A L E S  of the FABER-CASTELL POCKET-RIETZ   Model 67/87
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Front Side          [ inverse / RED ]              Back Side
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( 0 ...  14 cm Ruler )

K        X3
A        X2
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B        X2                                 S     sin(0.1X)
[CI]     [1/X]                              ST    arc(0.01X)
C        X                                  T     tan(0.1X)
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D        X
L        lgX

R E M A R K S :                   (  1° = 60' ;   1' = 60" )
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The TRIGONOMETRIC  SCALES  are divided in  MINUTES & SECONDS

There are 3 POCKET  »RIETZ«  in the Collection:

VERSION (A) Production Code = 12 70 = Dec. 1970
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This pocket SR came in a green artificial leather case
together with an instruction booklet.
  
VERSION (B) Production Code = 4 70 = April 1970  (NOT SHOWN)
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The background of A/B & C/D Scales is colored green.  The SR
came in a genuin green leather case.  The print on the back
side of the SR shows:  It was a gift of the company ...

   » Siegfried Kreimendahl / HOLZWAREN / Duesseldorf ... «

Version (C) Production Code = 9 70 = Sept. 1970
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This SR is different named:   » Model 167/87g «
The scales are the same - except the CI Scale is black.
It came as  » Civil Engineer's NOTEPAD «  in a leather case.



                   Historical Remarks ...
impressum:
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http://public.beuth-hochschule.de/~hamann           02/04/10