REISS, Bad Liebenwerda / (GDR) Germany (1970)
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VERSION (A)
SCALES of the REISS LIGHT METAL » RIETZ - SPEZIAL « Model 3201
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Front Side [ inverse / RED ] Back Side
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L lgX ST arc(0.1X)
DF πX T tan(0.1X)
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CF πX K X3
[CIF] [1/πX] B X2
C X C X
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D X S sin(0.1X)
[DI] [1/X] [P] [sqrt(1 - (0.1X)2)]
R E M A R K S : ( 1° = 60' ; 1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES(') & SECONDS(")
This beautiful aluminum model came with a "MANTISSA-Type" cursor.
There is a Newer (1975) Version (B) in the Collection
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The NAME is changed to »Rietz-Spezial-360« and the BODY-ENDS are
made different. Instead of glued blocks under the scales, now the
scales are embedded in metal ends and fixed with four metal pins:
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