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CONCISE   28   /  PAN_AM
( 8 cm Diameter )



CONCISE, Tokyo / Japan                              (1960)
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SCALES  of the  CIRCULAR SLIDE RULE  » CONCISE  Model 28 «
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   D       X                              outer circle
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   C       X                              inner circles
   CI      1/X
   A       X2
   K       X3

On the back side is the  » PAN AMERICAN AIRLINE «  LOGO:

                   

                Historical Remarks ...
impressum:
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http://public.beuth-hochschule.de/~hamann         02/28/08