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FABER-CASTELL   » POCKET «
( 12.5 cm Scales )



A.W.Faber-Castell, Stein bei Nuernberg / Germany         (1937)
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                             Production Code = 37_1 = Jan. 1937

S C A L E S   of  the   F.-C.   » P O C K E T «     Model 63/91
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Front Side                                            Back Side
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( 0 ...  14 cm Ruler )

    A     X2
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    B     X2                    S     sin(0.01X); sin(0.1X)
                                L     lgX
    C     X                     T     tan(0.1X)
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    D     X

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

                               S keyed to A/B ;  T keyed to C/D

This  POCKET-SR  is made of  PEAR WOOD  with  SCALES & BASE  of
celluloid veneer.  Ref. to the print on the back side,  this SR
was a gift from the Company  » Steffens & Noelle A.G., Berlin «
It came in a leather case.

                   Historical Remarks ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann  10/15/11