A.W.Faber-Castell, Stein bei Nuernberg / Germany   (1941)
*********************************************************

S C A L E S  of the   F.-C.  » MINI-POCKET «  Model 74/91
=========================================================
Front Side                                      Back Side
=========================================================
( 0 ...  10 cm Ruler )

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

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

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

This  MINI-POCKET  SR is made of pear wood with scales on
celluloid veneer.  It came in a leather case - and it was
NOT A TOY!  Ref. to the print on the nice cover, it was a
gift from the famous German  »SKF«  ball-bearing company.

Historical Remarks ...

Because the original cursor was missing, there is a home-
made of plastic. The hairline is made with a »X-ACTO« and
colored with a marker - and for "contrast" the edges too.

    

                       Production Code = 6 41 = June 1941
*********************************************************
© C.HAMANN   www.tfh-berlin.de/~hamann   impressum  10/27/08