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FABER-CASTELL POCKET-RIETZ ( 12.5 cm Scales )
A.W.Faber-Castell, Stein bei Nuernberg / Germany (1970)
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VERSION (A)
S C A L E S of the FABER-CASTELL POCKET-RIETZ Model 67/87
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Front Side [ inverse / RED ] Back Side
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( 0 ... 14 cm Ruler )
K X3
A X2
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B X2 S sin(0.1X)
[CI] [1/X] ST arc(0.01X)
C X T tan(0.1X)
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D X
L lgX
R E M A R K S : ( 1° = 60' ; 1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS
There are 3 POCKET »RIETZ« in the Collection:
VERSION (A) Production Code = 12 70 = Dec. 1970
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This pocket SR came in a green artificial leather case
together with an instruction booklet.
VERSION (B) Production Code = 4 70 = April 1970 (NOT SHOWN)
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The background of A/B & C/D Scales is colored green. The SR
came in a genuin green leather case. The print on the back
side of the SR shows: It was a gift of the company ...
» Siegfried Kreimendahl / HOLZWAREN / Duesseldorf ... «
Version (C) Production Code = 9 70 = Sept. 1970
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This SR is different named: » Model 167/87g «
The scales are the same - except the CI Scale is black.
It came as » Civil Engineer's NOTEPAD « in a leather case.
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