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FABER-CASTELL » DISPONENT « 111/22
( 25 cm Scales )
A.W.Faber-Castell, Stein bei Nuernberg / Germany (1967)
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Version (B)
S C A L E S of the FABER-CASTELL »DISPONENT« Model 111/22
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Front Side Scales in [RED] & {GREEN} Back Side
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( 0 ... 27 cm Ruler )
... M A R K S for non-metric conversions ...
DF 3.6*X KZ: K = Start-Kapital, Z = Zinsen
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[CF] [3.6*X] T = Tage (LL1) exp(0.01X)
(LL2) exp(0.1X)
{CI} {1/X} Val.; p% = Prozentsatz p% = Prozentsatz
[C] [X] E ; T = Tage (C) X
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D X Z = Zinsen
L lgX
Shilling (sh/d) / Pound (£) Conversion Scales
R E M A R K S : There are 2 Model 111/22 in the Collection
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To use the LL-Scales from the back side, the slider has to be turned.
Newer Version (B) Model 111/22
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Production Code = 5 67 = May 1967
This »DISPONENT« (=Merchant) Slide Rule is made of plastic.
On the BACK SIDE are conversion tables and how to calculate interest.
The DF,[CF]-Scales are folded at 3.6 * X for Days-of-the-Year.
The formula & translation:
Zinsen (in % ) = Z = ( K * p * n )/100 ; n = Jahre = Tage/360
( Z = Interest; K = Capital; p = Interest Rate; n = Years; T = Days )
The Older Version (A) Model 111/22 has different Scales-Names
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and different Shilling (sh/d) / Pound (£) Scales
Production Code = 57_6 = June 1957
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... It came in a green leather case. Details ...
... 