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FABER-CASTELL POCKET - NOVO-DUPLEX
( 12.5 cm with 25 cm Scales W1/W1' & W2/W2' )
A.W.Faber-Castell, Stein bei Nuernberg / Germany (1965)
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VERSION (A)
SCALES of the FABER-CASTELL NOVO-DUPLEX POCKET Model 62/83
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Front Side [ inverse / RED ] Back Side
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K X3 [LL03] [exp(-X)]
T1 tan(0.1X) ; [cot(0.1X)] [LL02] [exp(-0.1X)]
T2 tan(X) ; [cot(X)] [LL01] [exp(-0.01X)]
DF πX W2 sqrt(10X)
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CF πX W2' sqrt(10X)
[CIF] [10/πX] L lg(X)/2
[CI] [10/X] C X
C X W1' sqrt(X)
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D X W1 sqrt(X)
ST arc(0.01X) LL1 exp(0.01X)
S sin(0.1X) ; [cos(0.1X)] LL2 exp(0.1X)
[P] [sqrt(1 - (0.1X)2)] LL3 exp(X)
R E M A R K S : Production Code = 3 65 = March 1965
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Because the scales W1/W1' start at 1 and end at sqrt(10)
and the scales W2/W2' start at sqrt(10) and end at 10
the 12.5 cm NOVO-DUPLEX has the PRECISION of a 25 cm Scale
This POCKET SR came in F.-C.'s green artificial leather case
with the imprints »SIEMENS« and the logos »S+H« & »S+S« ,
indicating that this SR was a gift of the well known company.
There is a 2nd » POCKET NOVO DUPLEX « in the Collection:
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Version (B)
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Production Code = 9_69 = Sept. 1969
This SR has another CURSOR and D- & DF-Scale are not longer
green marked. There are 2 RED-INDEX-MARKS right on W1/W1' and
left on W2/W2' ; see DETAIL PICTURE ...
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Also this POCKET SR was a gift from the »SIEMENS« company.