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REISS - RIETZ   ( 25 cm Scales )
Have a look at an Older Version (A)

REISS, Bad Liebenwerda / (GDR) Germany                   (1975)
                                                    VERSION (B)

S C A L E S   of  the   R E I S S   LIGHT METAL   » R I E T Z «
Front Side            [ inverse / RED ]               Back Side
( 0 ...  28 cm Ruler )

K       X3
A       X2
B       X2                           S    sin(0.1X)
[CI]    [1/X]                        ST   arc(0.01X)
C       X                            T    tan(0.1X) ; cot(0.1X)
D       X
L       lgX

R E M A R K S :                      (  1° = 60' ;   1' = 60" )

There are 2 VERSIONS  »RIETZ«  in the Collection
Both beautiful aluminum slide rules came in plastic cases.

This newer version is made different:  A 28-CENTIMETER-RULER is
attached with screws - May be exchangeable with other rulers?
Instead of glued blocks under the scales, now the scales are
embedded in the metal BODY ENDS and fixed with four metal pins.
The inscription  »RIETZ«  is missing.  On the back side are
marks on the right side instead of an acrylic hairline - but on
the left side is an acrylic hairline added. The SLIDER ENDS are
splitted (? adjustment in case of less friction ?)

There are versions found with an original MEISSNER CURSOR:
( ... Used parts after fusion of MEISSNER + REISS = MANTISSA ?) 

Historical Remarks ...

A BLIND PRINT is on both back sides  over the acrylic hairline:
                                                (1) 37/350/1000
***************************************************************              09/11/09