GRAPHOPLEX SLIDE RULE SYSTEM RIETZ, CHEMICAL SLIDE RULE BOXED

Description

146 288-295
VINTAGE GRAPHOPLEX 1612 RIETZ CHEMICAL ORIGINAL BOXED
good condition with leather pouch and instructions , length 15 cm
box of this lot may has a small number sticker to be removed
100 gr EK 7,00
Generic slide rule of plastic, 151.5x33x4.5 mm
Front Scales: 13cm  /  B3  B2  =  b2  a  b  =  B  L
Back Scales: =  S  S&T  T  =
S C A L E S of the GRAPHOPLEX » R I E T Z « Model 620
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Front Side [ inverse / RED ] Back Side
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( 0 ... 27 cm Ruler )
(K) B3 X
3
(A) B2 X
2
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(B) b2 X
2
S sin(0.1X)
[CI] a [1/X] S&T arc(0.01X)
(C) b X T tan(0.1X)
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(D) B X
(L) 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
This attractive plastic SR has a table with physical constants &
conversions on its back. It came in a dark-red cardboard case.
The scale names printed on the SR are unusual - the common scale
names are given in brackets left beside.
COLLECTOR ITEM