GEBR. WICHMANN, Berlin / Germany                          (1930)
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made by Albert Nestler, Lahr in Baden / Germany  as Model  23R/3

SCALES  of  the  W I C H M A N N   » RIETZ «   Model  1418 R III
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Front Side             [ inverse / RED ]               Back Side
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( 0 ...  27 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

( 1:25 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 body, under the slider says  »A.N.A.G.« ,  an indicator for
made by  »A.NESTLER AG«.  Same SR as  NESTLER  Model »23/R3«

                    Historical Remarks ...
impressum:
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© C.HAMANN     http://public.BHT-Berlin.de/hamann       08/10/09