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FABER-CASTELL DARMSTADT ( 25 cm Scales )
A.W.Faber-Castell, Stein bei Nuernberg / Germany (1937)
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VERSION (A)
S C A L E S of the FABER-CASTELL » DARMSTADT « Model 1/54
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Front Side [ inverse / RED ] Back Side
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( 0 ... 27 cm Ruler )
L lgX
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K X3
A X2
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B X2 LL1 exp(0.01X)
[CI] [1/X] LL2 exp(0.1X)
C X LL3 exp(X)
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D X
[P] [sqrt(1 - (0.1X)2)]
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S sin(0.1X) ; [cos(0.1X)]
T tan(0.1X) ; [cot(0.1X)]
R E M A R K S :
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There are 3 Versions in the Collection:
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VERSION (A) Production Code = 37_12 = Dec. 1937
This historic wooden model came in a black cardboard case.
It has instructions how to use the slide rule on its back.
In the body under the slider is a 34 ... 56 cm ruler.
VERSION (B) Production Code = 55_2 = Feb. 1955
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The scales are glued only and have no longer "Fix-Points".
The CURSOR has changed and the LOGO "CASTELL" is printed.
The data sheet on its back side is the same as in Vers.(A)
The slide rule came in a green cardboard case.
Have a look at the