A.W.Faber-Castell, Stein bei Nuernberg / Germany      (1972)
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SCALES  of the  FABER-CASTELL  » NOVO-MENTOR «   Model 52/81
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FRONT SIDE         [ inverse / RED ]               BACK SIDE
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       A        X2            L       lgX
PERCENT-SCALE                 T1      tan(0.1X); [cot(0.1X)]
K|Z    DF       πX            T2      tan(X); [cot(X)]
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T      CF       πX            S'      sin(0.1X); [cos(0.1X)]
       [CIF]    [1/πX]
[p%]   [CI]     [1/X]         [CI]    [1/X]
T      C        X             C       X
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Z      D        X             D       X
       K        X3            S       sin(0.1X); [cos(0.1X)]
                              ST      arc(0.01X)

REMARKS:
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This slide rule came in a grey plastic case together with
a sheet with symbols, formulas and diagrams to set theory.

This slide rule is a "Two-In-One",  because it has special
marks on its cursor and scales included to be a "Merchant's"
as well as an "Engineer's Slide Rule".

Historical Remarks ...

                           Production Code = 5 72 = May 1972
impressum:
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© C.HAMANN    http://public.BHT-Berlin.de/hamann    10/23/07