Cylindrical Slide Rules

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Cylindrical slide rules have the scales wrapped around rotating cylinders.
Typical examples are the Otis King and the Fuller Calculator.  Examples are shown below.
Scale lengths are typically from 6 feet on the Otis King to 30 feet on the Fuller.

 

Click an image below for larger image and details.

  FullerLowRes OK Model K
 
Otis King Model K
  Model L
 
Otis King Model L
   
   
   
   
   
   
   
 
 
Fuller No1