DIWA, Gentofte / Denmark                                 (1950)
***************************************************************

S C A L E S   of  the   D I W A    POCKET-RIETZ       Model 601
===============================================================
Front Side           [ inverse / RED ]                Back Side
===============================================================
  ( 0 ...  11 cm  /  0 ... 4"  Ruler )

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

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

This  Pocket SR  came with a brown leather case in a green box.
The  "DIWA"-Logo  is placed on the back side of the slider  and
the cursor is also different to the ( deci-trig )  Model 601-1

                     Historical Remarks ...
impressum:
***************************************************************
© C.HAMANN     http://public.BHT-Berlin.de/hamann      09/11/12