DIWA, Gentofte / Denmark                                 (1960)
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S C A L E S   of  the   D I W A    POCKET-RIETZ       Model 621
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Front Side           [ inverse / RED ]                Back Side
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( 0 ... 5"  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
                                         ( 0 ... 13 cm  Ruler )

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

The "DIWA"-Logo is placed on the back side of the slider.  This
Pocket SR came with a brown leather case.  It was a gift of the
» SKF «  Ball Bearing Company.  Its LOGO is printed on the back
side of the SlideRule and on its leather case.

                     Historical Remarks ...
impressum:
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© C.HAMANN     http://public.BHT-Berlin.de/hamann      12/22/12