FREDERICK POST CO., Chicago, Illinois / USA             (1959)
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                                        made by  HEMMI / Japan

SCALES of the  P O S T  Bamboo-Based  P O C K E T  Model 1444K
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Front Side            [ inverse / RED ]              Back Side
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A          X2
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B          X2                    S       sin(0.01X); sin(0.1X)
[CI]       [1/X]                 L       lgX
C          X                     T       tan(0.1X)
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D          X
K          X3

R E M A R K S :                     (  1° = 60' ;   1' = 60" )
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The  TRIGONOMETRIC SCALES  are  divided  in  MINUTES & SECONDS

S keyed to A/B ;  T keyed to C/D

The bamboo sides are held together with a metal sheet.
The slide rule came in a red-brown leather case.

HEMMI introduced a year code, starts with  1950 = "A" ... 
and the month code starts with  Jan. = "A" ...  This slide
rule has the code "SI", means it is made in September 1968.

                   Historical Remarks to POST ...
                   Historical Remarks to HEMMI ...
impressum:
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© C.HAMANN   http://public.BHT-Berlin.de/hamann    05/21/08