FREDERICK  P O S T  CO., Chicago, Illinois / USA         (1969)
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                                         made by  HEMMI / Japan

S C A L E S   of  the   P O S T    Bamboo - Based    Model 1445
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Front Side             [ inverse / RED ]              Back Side
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   K        X3
   DF       πX
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   CF       πX                            T       tan(0.1X)
   [CIF]    [1/πX]                        ST      arc(0.1X)
   C        X                             S       sin(0.1X)
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   D        X
   A        X2

REMARKS:
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This SR came in the original  clear plastic holder  for a  RING
DIARY. It fits with its INTERMEDIATE SCALE-LENGTH of 8" / 20 cm

HEMMI introduced a year code, starts with  1950 = "A" ... 
and the month code starts with  Jan. = "A" ...  This slide
rule has the code "TF", means it is made in June 1969.

                    Historical Remarks to POST ...
                    Historical Remarks to HEMMI ...
impressum:
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© C.HAMANN     http://public.BHT-Berlin.de/hamann      07/13/12